William, Prince of Wales

William was made Duke of Cambridge prior to his marriage to Catherine Middleton in 2011. The couple have three children: Prince George, Princess Charlotte, and Prince Louis. He became Duke of Cornwall and Duke of Rothesay following his father's accession to the throne on 8 September 2022. The following day, he was made Prince of Wales, a title reserved for the heir apparent of the monarch.

In March 2022, William and Catherine embarked on a tour of Belize, The Bahamas and Jamaica as part of the Queen's Platinum Jubilee celebrations. They encountered criticism from a number of political figures and the press, given the British royal family's ancestral connections to colonialism and the Atlantic slave trade. Reparations for slavery emerged as a major demand of protesters during the couple's visit. During the visit, Jamaican prime minister Andrew Holness told the couple that the country planned to become a republic. William assured that the royal family would accept each country's decision with "pride and respect". During the unveiling of the National Windrush Monument in London, William described the Caribbean tour as "an opportunity to reflect" on "the different issues that matter most to the people of the region", and referring to the Windrush scandal, he condemned the racism faced by members of the Windrush generation and discrimination against minorities in 2022.

In May 2022, William attended the State Opening of Parliament for the first time as a counsellor of state, where his father the Prince of Wales delivered the Queen's Speech on behalf of William's grandmother.

Following the death of Queen Elizabeth on 8 September 2022, William was created as Prince of Wales by his father on 9 September 2022. Controversy regarding the title became a topic of public debate in Wales. On 10 September 2022, William attended the Proclamation Council of Charles III, and served as a witness together with his stepmother Camilla. By 17 September, a petition calling for the end of the title had received over 30,000 signatures, while a YouGov poll showed 66% support for Prince William to be given the title compared to 22% opposed. On 27 September 2022, William and Catherine visited Anglesey and Swansea, which marked their first visit to Wales since becoming Prince and Princess of Wales. On 30 October, Senedd Llywydd Elin Jones noted that an investiture is not a constitutional requirement and suggested that a 21st century Wales does not need an investiture, and that perhaps the monarchy would not want it either.

In March 2022 and amid the Russian invasion of Ukraine, William and Catherine made a donation to help the refugees.

In November 2022, William was criticised by Welsh football followers and the Welsh actor Michael Sheen for holding the Prince of Wales title whilst having affiliations with England football, particularly after he presented England jerseys to the squad in advance of the 2022 FIFA World Cup in which both Wales and England would be playing. Following this controversy, Kensington Palace also released a statement saying an investiture is "not on the table" with William visiting Cardiff with plans to tell the people of Wales that there are no formal plans for an investiture ceremony, aware of the controversy of the 1969 event.

In June 2022, a three-minute video of William confronting Terry Harris, a paparazzi photographer, was posted to Harris's YouTube channel. It was recorded by Harris in January 2021 and shows William arguing with Harris as he attempts to film his family on a bike ride near Anmer Hall. Kensington Palace described the video as a breach of the family's privacy and asked for it to be removed from public websites. The couple's lawyers also contacted the photographer, who claimed he was on public roads and had filmed the video after hearing about allegations that the Prince and Princess had broken the "rule of six" as they toured a public attraction at Sandringham while William's uncle and aunt, the Earl and Countess of Wessex, and their children happened to be in the same spot.

On the accession of his father on 8 September 2022, as the eldest son of the monarch, he automatically became Duke of Cornwall, Duke of Rothesay, Earl of Carrick, Baron of Renfrew, Lord of the Isles, and Prince and Great Steward of Scotland. On 9 September 2022, the King announced the creation of William as Prince of Wales. The usage of this title has been subject to controversy over the past decades.

In February 2019, William and Catherine carried out a two-day visit of Northern Ireland, visiting Belfast, Fermanagh, and Ballymena. In March and April 2019, William spent three weeks working for MI6, MI5 and GCHQ. William and Catherine toured Pakistan in October 2019, which was the royal family's first visit to the country in 13 years. In December 2019, William visited Kuwait and Oman, commemorating the 120th anniversary of the Anglo-Kuwaiti Agreement of 1899. In March 2020, the couple carried out a three-day tour of Ireland, visiting County Meath, Kildare, and Galway. In October 2020, the couple met Volodymyr Zelensky, the President of Ukraine, and First Lady Olena Zelenska, at Buckingham Palace, the first royal engagement held at the residence since the start of the COVID-19 pandemic. In December, the couple embarked on a three-day tour of England, Scotland, and Wales via the British royal train "to pay tribute to the inspiring work of individuals, organisations and initiatives across the country" in 2020. Prime Minister Boris Johnson expressed his support for the initiative, while First Minister of Scotland Nicola Sturgeon criticised the tour, citing travel restrictions; UK, Scottish and Welsh governments were consulted before planning the tour. In William's capacity as Lord High Commissioner to the General Assembly of the Church of Scotland, the couple toured Edinburgh, Fife and Orkney in May 2021. In Cornwall on 11 June 2021, William and Catherine attended the G7 summit for the first time. They also attended a reception, where William and his father discussed governmental and corporate solutions to environmental problems.

In February 2021, William visited a vaccination centre in King's Lynn and later encouraged use of the vaccine, denouncing false information that could cause vaccine hesitancy. In May 2021, he got his first dose of COVID-19 vaccine by NHS staff at the Science Museum in London. In September 2021, it was reported that William had helped an Afghan officer who was a graduate of the Royal Military Academy Sandhurst and an assistant to the British troops be evacuated from the Kabul airport along with more than 10 members of his family amid the 2021 Taliban offensive.

In early 2021, William made a private donation to the Thin Green Line Foundation, which provides grants for the relatives of conservation park rangers that are killed every year while protecting wildlife. In July 2022, William condemned the murder of South African park ranger Anton Mzimba and asked for the responsible parties to "be brought to justice". In August 2022, he voiced his support for the 63-month prison sentence given in the United States to a man responsible for trafficking rhinoceros horns and elephant ivory, calling it "a significant victory". He had previously called for harsher punishments and penalties for poachers and smugglers at the Illegal Wildlife Trade Conference in 2018.

To commemorate World Mental Health Day on 11 October 2021, William and Catherine posted a message on Instagram, sharing several organisations that support those who are struggling with mental health. In May 2021 and 2022, William and Catherine voiced the Mental Health Minute message, which was broadcast on every radio station in the UK on and asked people to help individuals around them that suffer from loneliness. In October 2022 and to mark the World Mental Health Day, the couple took over Newsbeat and interviewed four guests on topics related to mental health.

In February 2021, following an investigation into racism directed at Marcus Rashford, William released a statement as president of the FA, denouncing the "racist abuse... whether on the pitch, in the stands, or on social media" as "despicable" and stating that "we all have a responsibility" to create an environment of tolerance and accountability. In April 2021, William criticised the planned breakaway competition The Super League, adding that he "share[d] the concerns of fans about the proposed Super League and the damage it risks causing to the game we love." In July 2021, he condemned racist attacks against England football players following their loss at the UEFA Euro 2020 finale.

In July 2021, ITV aired a documentary entitled Harry and William: What Went Wrong?, centring on the princes' relationship. Before the film aired, footage of journalist Omid Scobie claiming that a senior aide from Prince William's household had briefed journalists about "concerns regarding Prince Harry's mental health" was partially cut from the documentary after Kensington Palace informed the broadcaster that the claim was "potentially defamatory".

On 1 November 2020, it was reported that William had tested positive for COVID-19 in April but decided not to alert the media to 'avoid alarming the nation'. The Daily Telegraph reported he had been "very ill" and had isolated away from his family; other sources say that he had not been seriously ill, not bed-ridden and working for most of the time.

In March 2020, William appeared in a video for the National Emergencies Trust, launching a fundraising appeal to help charities during the pandemic. The appeal raised £11 million in its first week, eventually totalling to £90 million, with the money going out to "front line charities" and to the UK Community Foundations to be distributed among "local community foundations". In April 2020, he officially became the patron of the organisation. In April 2020, he made a surprise appearance in The Big Night In, a 20 April 2020 telethon held during the COVID-19 pandemic, in a skit which he held a video call with Stephen Fry, who revised his role as (a descendant of) Lord Melchett, from the Blackadder series.

In May and June 2020, the couple, alongside their children, delivered food parcels made on the Sandringham Estate to local isolated pensioners during the COVID-19 pandemic. In October 2020, William laid the foundation stone of the hospital's Oak Cancer Centre, 30 years after his mother did the same for their Chelsea Wing in 1990. In December 2020, William and his wife became joint patrons of NHS Charities Together.

After two years of research, William launched the Earthshot Prize in October 2020, designed to provide funding and incentive for environmental solutions over the next decade. The Prize is slated to be given every year from 2021 until 2030 to five winners each year, in accordance with five categories detailing the restoration of nature, air cleanliness, ocean conservation, waste-free living, and climate change. The selection process will be performed by the Prince, alongside a council of judges from six continents, overseen by a panel of experts. The first awards ceremony is slated to take place in London in autumn 2021. Following the launch, William gave a TED Talk on environmental protection and conservation as part of the TED Countdown climate change initiative. Later that month, William took over the patronages of Fauna and Flora International and the British Trust for Ornithology, passed on from the Queen and Prince Philip. In the same month, he appeared in an ITV documentary titled Prince William: A Planet For Us All to discuss environmental issues.

In late March 2020, William and Catherine began supporting a new mental health initiative by the Public Health England amidst the coronavirus pandemic. In April 2020, the couple announced Our Frontline, an initiative providing mental health support to emergency medical workers. In May 2020, the couple's recorded radio message for Mental Health Awareness Week was broadcast across all the stations in the UK. In June 2020, William stated that he had been serving as a volunteer on the Shout hotline during the pandemic. In September 2020, he established the Emergency Responders Senior Leaders Board, commissioned by the foundation to research the mental health and wellbeing of emergency responders. The project is in partnership with King's College London and the Open University.

William has been patron of homelessness charity The Passage since 2019 after first visiting the centre in 1992 with his mother. In October 2020, he wrote the introduction to the organisation's 40th-anniversary fundraising cookbook, discussing the importance of helping victims of homelessness during the COVID-19 pandemic. In December 2020, William volunteered at the charity to help prepare donation bags for homeless residents in emergency hotel accommodations and spoke with residents about their experiences. In March 2022, he was spotted selling copies of The Big Issue on the streets, copies of which are usually sold by homeless and unemployed people to collect money.

In November 2018 and during a visit to the BBC studios in central London, William publicly criticised the social media firms' approach to handling "misinformation and conspiracy" and added, "Their self-image is so grounded in their positive power for good that they seem unable to engage in constructive discussion about the social problems they are creating".

William left his position with EAAA in July 2017 to assume full-time royal duties on behalf of his grandmother. After supporting an anniversary campaign for London's Air Ambulance Charity in 2019, he became the charity's official patron in March 2020. In May 2020, he granted permission to the charity to use Kensington Palace's private lawn to refuel during the COVID-19 pandemic. To mark Air Ambulance Week 2020, he wrote a letter thanking air ambulance workers, stating his "profound respect" for the community, particularly during the "immeasurably difficult" outbreak, and stated that "the country owes you an enormous debt of gratitude."

In March 2017, a video of William "dad dancing" at a nightclub in Verbier, Switzerland surfaced in tabloid media. At the time, he was on a skiing holiday, and was reportedly observed partying alongside friends and models. The incident garnered commentary and criticism as it took place on Commonwealth Day service at Westminster Abbey, which was attended by other senior members of the royal family. The following month, when asked a music-related question during a BBC One interview for the Heads Together campaign, he commented, referring to the reports: "I've got into enough trouble with my dancing recently. So it's probably best to stay away from that one."

William has spoken out for LGBT rights as part of his work against cyberbullying, stating the importance of being "proud of the person you are" and discussing the effects of online abuse and discrimination. In 2016, he appeared in the July issue of Attitude and became the first member of the royal family to be featured on the cover of a gay magazine. He was recognised at the British LGBT Awards in May 2017.

In November 2016, William issued a statement supporting his brother Harry and his then girlfriend Meghan Markle following their complaints about the press intrusion, stating that he "understands the situation concerning privacy and supports the need for Prince Harry to support those closest to him."

In 2014, it was announced that William would accept a full-time role as a pilot with the East Anglian Air Ambulance (EAAA) based at Cambridge Airport. Despite his qualifications as a military helicopter pilot, William needed a civil pilot's licence and further training before being permitted to take command of the Air Ambulance. Although his position was paid, Kensington Palace announced that William would donate his full salary to the EAAA charity. He underwent part of his training as an EAAA pilot at Norwich Airport. On 13 July 2015, William started his new job, which he felt was a natural progression from his previous role as an RAF search-and-rescue pilot. William described working irregular shifts and dealing mostly with critical care cases. He also publicly discussed the consequences, witnessing intensive trauma and bereavement as an emergency worker, stating that it impacted his mental health and personal life. The BBC has written that William was "exposed to the National Health Service in a way that no other senior royal has been or possibly ever will be."

In February 2015, William visited Japan, meeting with Emperor Akihito and Empress Michiko at the Imperial Palace and visiting survivors devastated by the 2011 tsunami. From 1 to 4 March, he visited the Chinese cities Beijing, Shanghai, and Yunnan and met with President Xi Jinping. It was the first royal visit to mainland China in almost three decades. In April 2016, William and his wife undertook a tour to India and Bhutan. Activities included visiting children's charities such as Childline India, as well as a visit to Lingkana Palace. Later that month, the couple met again with the Obamas at Kensington Palace. In April 2016, William and Catherine toured to India and Bhutan. The couple toured Canada once again in September 2016. In November 2016, he visited Vietnam, meeting with Prime Minister Nguyen Xuan Phuc and touring local primary schools. Countries visited by the couple in 2017 include France, Poland, Germany, and Belgium. In January 2018, the couple visited Sweden and Norway. The visits, which were, like others, requested by the Foreign Office, were interpreted to benefit UK-European relations post Brexit. In June 2018, William toured Jordan, Israel and Palestine.

William performs official duties and engagements on behalf of the King. He holds patronage with over 30 charitable and military organisations, including the Tusk Trust, Centrepoint, and London's Air Ambulance Charity. He undertakes projects through The Royal Foundation, with his charity work revolving around mental health, conservation, and emergency workers. In December 2014, he founded the "United for Wildlife" initiative, which aims to reduce worldwide illegal wildlife trade. In April 2016, William, his wife Catherine and his brother Harry initiated the mental health awareness campaign "Heads Together" to encourage people to open up about their mental health issues. In October 2020, William announced the launch of the Earthshot Prize, a £50 million initiative to incentivise environmental solutions over the next decade.

Upon graduation from university, William interned in land management at Chatsworth House and in banking at HSBC. To prepare for his eventual management of the Duchy of Cornwall, in 2014, he enrolled in a vocational agricultural management course at Cambridge, which was organised by the Cambridge Programme for Sustainability Leadership (CPSL), of which his father is patron.

In 2014, the brothers inherited their mother's wedding dress along with many other of her personal possessions including dresses, diamond tiaras, jewels, letters, and paintings. The brothers also received the original lyrics and score of "Candle in the Wind" by Bernie Taupin and Elton John as performed by John at Diana's funeral.

In October 2014, William and Catherine sent a legal letter to a freelance photographer who had put their son George and his nanny "under surveillance", asking the individual to stop "harassing and following" them. In August 2015, Kensington Palace published a letter detailing what it stated were the "dangerous" and invasive efforts of the media to get paparazzi pictures of Prince George and Princess Charlotte. Jason Knauf, communications secretary to the couple, wrote the letter to media standards organisations in various countries.

William descends matrilineally from Eliza Kewark, a housekeeper for his eighteenth-century ancestor Theodore Forbes—a Scottish merchant who worked for the East India Company in Surat. She is variously described in contemporary documents as "a dark-skinned native woman", "an Armenian woman from Bombay", and "Mrs. Forbesian". Genealogist William Addams Reitwiesner assumed Kewark was Armenian. In June 2013, BritainsDNA announced that genealogical DNA tests on two of William's distant matrilineal cousins confirm Kewark was matrilineally of Indian descent.

Catherine's first pregnancy was announced on 3 December 2012. She was admitted on 22 July 2013 to the Lindo Wing of St Mary's Hospital, London, where Prince William had been delivered. Later that day, she gave birth to Prince George. On 8 September 2014, it was announced that Catherine was pregnant with her second child. She was admitted on 2 May 2015 to the same hospital and gave birth to Princess Charlotte. Catherine's third pregnancy was announced on 4 September 2017; Prince Louis was born on 23 April 2018.

William and Catherine served as ambassadors for the 2012 Summer Olympics in London, during multiple sporting events throughout the games. In September 2012, they toured Singapore, Malaysia, Tuvalu, and the Solomon Islands as part of the Queen's Diamond Jubilee celebrations. William and Catherine attended further commemorations of the Jubilee throughout the year, including the Thames Diamond Jubilee Pageant in July. The Prince hosted his first investiture ceremony at Buckingham Palace in October 2013. In April 2014, William and Catherine undertook a royal tour to New Zealand and Australia with their son, Prince George. The itinerary included visiting the Plunket Society for children and visiting fire-damaged areas in New South Wales. In June 2014, the couple visited France to attend the commemoration of the 70th anniversary of the Normandy landings at Gold Beach. In September 2014, William visited Malta to commemorate its 50th independence anniversary, substituting for his wife after the announcement of her second pregnancy. On 21 October, William and Catherine met the President of Singapore, Tony Tan, during his state visit to the UK. In December 2014, he met with President Obama in the Oval Office, and made a speech at the World Bank in Washington, D. C., condemning the illegal trade in wildlife. In December 2014, the couple visited New York and attended a charity dinner at the Metropolitan Museum of Art.

In September 2012, the French edition of Closer and Italian gossip magazine Chi published photographs of Catherine sun-bathing topless while on holiday at the Château d'Autet, a private château on a 260-ha estate in Provence. Analysts from The Times believed the photographs were taken from the D22 (Vaucluse) road half a kilometre from the pool—a distance that would require an 800-mm or a 1000-mm lens. On 17 September 2012, the Prince and Princess filed a criminal complaint with the French prosecution department and launched a claim for civil damages at the Tribunal de Grande Instance de Nanterre. The following day the courts granted an injunction against Closer prohibiting further publication of the photographs and announced a criminal investigation would be initiated. Under French law, punitive damages cannot be awarded but intrusions of privacy are a criminal offence carrying a maximum jail sentence of one year and a fine of up to €45,000 for individuals and €225,000 for companies. In September 2017, Closer was fined €100,000 and its editor Laurence Pieau and owner Ernesto Mauri were each fined €45,000.

In April 2011, Time magazine selected him as one of the 100 Most Influential People in the World. In December 2022, he was found to be the most liked member of the royal family by statistics and polling company YouGov.

William has been a British prince since birth. On his wedding day, 29 April 2011, his grandmother Elizabeth II created him Duke of Cambridge, Earl of Strathearn and Baron Carrickfergus. The letters patent granting these titles were issued on 26 May that year.

In Canada, a personal heraldic banner for the Prince of Wales was first issued in 2011, consisting of the shield of the Arms of Canada defaced with both a blue roundel of the Prince of Wales's feathers surrounded by a wreath of gold maple leaves, and a white label of three points.

Prior to the accession of his father, William used a banner derived from his arms, for use outside of Scotland and Canada. There was a variation of this used when in Scotland. In 2011, the Canadian Heraldic Authority introduced a personal heraldic flag for the Duke of Cambridge's use in Canada. It is the Royal Arms of Canada in banner form defaced with a blue roundel surrounded with a wreath of gold maple leaves and shells within which is a depiction of a "W" surmounted by a coronet. Above the roundel is a white label of three points, charged with a red shell.)

In January 2009, William transferred his commission to the RAF and was promoted to Flight Lieutenant. He trained to become a helicopter pilot with the RAF's Search and Rescue Force. In January 2010, he graduated from the Defence Helicopter Flying School at RAF Shawbury. On 26 January 2010, he transferred to the Search and Rescue Training Unit at RAF Valley, Anglesey, to receive training on the Sea King search and rescue helicopter; he graduated in September 2010. This made him the first member of the British royal family since Henry VII to live in Wales.

William's first rescue mission as co-pilot of an RAF Sea King was a response to an emergency call from Liverpool Coastguard on 2 October 2010. In November 2011, he participated in a search-and-rescue mission involving a cargo ship that was sinking in the Irish Sea; William, as a co-pilot, helped rescue two sailors.

On 16 November 2010, Clarence House announced that William and Catherine were to marry; the couple had become engaged in Kenya in October. The engagement ring given by William to Catherine had belonged to his mother. The wedding took place in Westminster Abbey, London, on 29 April 2011. A few hours before the ceremony, William's new titles Duke of Cambridge, Earl of Strathearn, and Baron Carrickfergus were announced. The global audience for the wedding was estimated to be 300 million or more, with 26 million people watching the event live in the United Kingdom alone. The couple were given the country home, Anmer Hall, on the Sandringham Estate, as a wedding gift from the Queen. Following their marriage in 2011, William and Catherine used Nottingham Cottage as their London residence. They moved into the four-storey, 20-room Apartment 1A at Kensington Palace in 2013. The £4.5 million renovation took 18 months. Kensington Palace became the couple's main residence in 2017, moving from their country home, Anmer Hall. In 2022, it was announced that the couple, along with their children, would move to Adelaide Cottage in Windsor.

In June 2010, William and his brother visited Botswana, Lesotho, and South Africa, visiting projects relating to wildlife, sport, and young children. In November 2010, he attended a memorial service held on Remembrance Day at Camp Bastion, Afghanistan. In March 2011, William visited Christchurch, New Zealand, shortly after the earthquake, and spoke at the memorial service at Hagley Park on behalf of his grandmother. He also travelled to Australia to visit areas affected by flooding in Queensland and Victoria. In May 2011, William and Catherine met with U.S President Barack Obama and First Lady Michelle Obama at Buckingham Palace. The couple toured Canada in summer 2011, attending Canada Day celebrations on Parliament Hill. On 2 November, the couple visited the UNICEF Supply Division for malnourished children in Copenhagen, Denmark.

Since 2009, William has been the patron of Child Bereavement UK, which provides support for children and families who have lost a loved one. In 2016, the Royal Foundation launched multiple mental health initiatives, including Heads Together, a campaign led by William, Catherine and Prince Harry to de-stigmatise mental health. Legacy programmes include Mental Health at Work, launched in September 2018 to change the approach to workplace mental health in the UK, as well as Heads Up, launched in May 2019 in partnership with the Football Association, utilising football to affect the conversation surrounding mental health in adults. Later that month, the couple together with William's brother and sister-in-law launched Shout, the UK's first 24/7 text messaging service for those who suffer from mental issues. William later volunteered on the crisis helpline during the COVID-19 lockdowns to provide support via text message. In October 2019, the Prince, together with other members of the royal family, voiced a PSA video for Public Health England "as part of its Every Mind Matters program". William attributes his interest in mental health to his experiences as an air ambulance pilot, his work with the homeless, veterans' welfare, and his wife's anti-addiction advocacy.

Born in London, William was educated at Wetherby School, Ludgrove School and Eton College. He earned a Scottish Master of Arts degree in geography at the University of St Andrews. William then trained at Royal Military Academy Sandhurst prior to serving with the Blues and Royals. In April 2008, William graduated from Royal Air Force College Cranwell, joining RAF Search and Rescue Force in early 2009. He served as a full-time pilot with the East Anglian Air Ambulance for two years, starting in July 2015.

After completing his training, William undertook an attachment with the Royal Air Force at RAF Cranwell. Upon completing the course he was presented with his RAF wings by his father, who had received his own wings after training at Cranwell. During this secondment, William flew to Afghanistan in a C-17 Globemaster that repatriated the body of Trooper Robert Pearson. William was then seconded to train with the Royal Navy. He completed an accelerated Naval Officer training course at the Britannia Royal Naval College. Whilst serving on HMS Iron Duke in June 2008, William participated in a £40m drug seizure in the Atlantic, north-east of Barbados. He was a part of the crew on the Lynx helicopter which helped seize 900 kg of cocaine from a speedboat.

William's position as second-in-line to the throne at the time and the convention of ministers advising against placing that person into dangerous situations cast doubts on his chances of seeing combat, which increased after Prince Harry's deployment was cancelled in 2007 due to "specific threats". William, instead, went on to train in the Royal Navy and Royal Air Force, obtaining his commission as a sub-lieutenant in the former and flying officer in the latter—both broadly equivalent to the army rank of lieutenant.

In April 2007, William and Middleton ended their relationship. Middleton and her family attended the Concert for Diana in July 2007 at Wembley Stadium, where she and Prince William sat two rows apart. The couple were subsequently seen together in public on a number of occasions and news sources stated that they had "rekindled their relationship". Middleton was in attendance during the Order of the Garter procession ceremony at Windsor Castle in June 2008, where Prince William was made a Royal Knight of the Garter. In June 2010, the couple moved into a cottage on the Bodorgan Estate in Anglesey, Wales, where William resided during his RAF search-and-rescue training and subsequent career.

In 2007, William and Harry organised the Concert for Diana, in memory of their mother, which benefitted the charities and patronages of Diana, William, and Harry. In October 2008, William and his brother embarked on the 1,000 mile eight-day Enduro Africa motorbike ride across South Africa to raise money for Sentebale, UNICEF and the Nelson Mandela Children's Fund. In 2010, he also became a patron of 100 Women in Hedge Funds Philanthropic Initiatives. William succeeded Lord Attenborough in 2010 as the fifth president of the British Academy of Film and Television Arts. In March 2011, William and Catherine set up a gift fund held by The Foundation of Prince William and Prince Harry to allow well-wishers who wanted to give them a wedding gift to donate money to charities instead. The gift fund supported 26 charities of the couple's choice, incorporating the armed forces, children, the elderly, art, sport and conservation. The charity has since been renamed The Royal Foundation.

Having decided to follow a military career, William was admitted to the Royal Military Academy Sandhurst in January 2006. As "Lieutenant Wales"—a name based on his father's title Prince of Wales—he followed his younger brother into the Blues and Royals as a troop commander in an armoured reconnaissance unit, after which he spent five months training for the post at Bovington Camp, Dorset.

Their relationship was followed so closely by the tabloid press that bookmakers took bets on the possibility of marriage, and the retail chain Woolworths produced memorabilia bearing their likenesses. Media attention became so intense that William asked the press to keep their distance from Middleton. On 15 December 2006, Middleton attended Prince William's Passing Out Parade at the Royal Military Academy Sandhurst.

William often plays polo to raise money for charity. He is a fan of football, and supports the English club Aston Villa. He became President of England's Football Association in May 2006 and vice-royal patron of the Welsh Rugby Union (WRU) in February 2007, supporting the Queen as patron. The same year, the WRU's decision to name a new cup for test matches between Wales and South Africa the Prince William Cup caused controversy; some believed it would have been more appropriate to name it after Ray Gravell. In December 2010, William and Prime Minister David Cameron attended a meeting with FIFA vice-president Chung Mong-joon at which Chung suggested a vote-trading deal for the right to host the 2018 World Cup in England. The English delegation reported the suggestion to FIFA's ethics investigator because they considered vote-swapping to be a violation of anti-collusion rules. In 2011, William as President of the English FA, voted against Australia's 2022 FIFA bid and instead voted for South Korea; despite being the country's future heir. In 2020, again as President of the English FA, he voted against the joint Australia–New Zealand 2023 FIFA Women's World Cup bid and instead voted for Colombia.

In 2006, William, along with other Sandhurst officers, took part in a one-mile (1.6 km) run to support the charity Sport Relief, as he had done in 2004 with a team from Clarence House. In May 2007, William became patron of the English Schools' Swimming Association. In 2012, together with his wife Catherine and Prince Harry, William launched Coach Core. The program was set up following the 2012 Olympics and provides apprenticeship opportunities for people who desire to pursue a career as a professional coach. In 2014, he and Catherine were awarded Honorary Life Membership of the Marylebone Cricket Club. In May 2020, he appeared in a BBC One Documentary titled Football, Prince William and Our Mental Health as a part of a campaign to promote men to discuss their mental issues using football as a common medium.

Prince William became a patron of the Tusk Trust in December 2005, a charity that works towards conserving wildlife and initiating community development, including providing education, across Africa. He became associated with the organisation after he witnessed its work first hand in Africa. Stating that "rural African initiatives that foster education, responsibility and participation in the local community light the way to conservation", he carried out his first official duty with the trust in launching a 5,000-mile (8,000 km) bike ride across the African continent in 2008. Later, William helped with launching the Tusk Conservation Awards, which have been presented to selected environmental activists annually since 2013. William has occasionally commented on the effects of overpopulation on the wildlife of Africa, but his remarks have been criticised for not taking resource consumption and population density into consideration, both of which affect wildlife in rich and developed countries. In 2013, he succeeded his grandfather Prince Philip, Duke of Edinburgh, as president of the UK charity Fields in Trust. He established the United for Wildlife Transport Taskforce in December 2014, with the goal of reducing global illegal wildlife trade.

In September 2005, William granted his patronage to Centrepoint, a charity that assists the homeless. In December 2009, he, as part of a Centrepoint-organised event, spent the night in a sleeping bag near the Blackfriars Bridge to raise awareness of the experiences of homeless youth. The Prince opened their new facility, Apprenticeship House, in November 2019 to mark their 50-year anniversary.

On 13 November 2005, an article appeared in the News of the World written by royal editor Clive Goodman, that claimed that Prince William was in the process of borrowing a portable editing suite from ITV royal correspondent Tom Bradby. Prince William noted that another equally improbable leak had recently taken place regarding an appointment he had made with a knee surgeon. After some discussion, the Prince and Bradby concluded it was likely that their voicemails were being accessed. An investigation under Deputy Assistant Commissioner Peter Clarke concluded that the compromised voice mail accounts belonged to Prince William's aides, including Jamie Lowther-Pinkerton, and not the Prince himself. However, Clive Goodman later stated that he had hacked William's phone on 35 occasions.

In 2005 and after his then girlfriend Catherine Middleton was chased by the paparazzi on her way to an interview, William consulted Middleton and her father and penned a legal letter to newspapers requesting that they respect her privacy. As media attention increased around the time of Middleton's 25th birthday in January 2007, he issued a public statement, mentioning that he was "very unhappy at the paparazzi harassment of his girlfriend" and wanted "for it to stop" as "the situation is proving unbearable for all those concerned." In October 2007, William issued a public statement via his press secretary complaining about the "aggressive pursuit" by "photographers on motorcycles, in vehicles and on foot" while he and Middleton were leaving a London nightclub and later driving in his car. Following the statement, Daily Mail, Daily Mirror, and Daily Express all decided against using the paparazzi photos of the couple, but The Sun published photos taken before the couple's car had left. The statement prompted the Press Complaints Commission (PCC) to issue a warning, asking editors not to publish photographs which were taken through harassment.

At the age of 21, William was appointed a Counsellor of State; he first served in that capacity when the Queen attended the Commonwealth Heads of Government Meeting in 2003. On his 21st birthday, William accompanied his father on a visit to Wales, visiting the Anglesey Food Festival and opening a centre for the homeless in Newport. Upon graduating from university, William began royal duties in support of, and on behalf of, the Queen at official events, public engagements, and overseas tours. In July 2005, he embarked on his first solo overseas tour, travelling to New Zealand to participate in World War II commemorations. For the 30th anniversary of his father's charity The Prince's Trust, William and his brother were jointly interviewed for the first time by television personalities Ant & Dec. According to author Tina Brown, he had, like his father, expressed a desire to become Governor-General of Australia. Prime Minister of Australia John Howard expressed his wish for the position to be held by an Australian citizen. In 2009, the Queen set up a private office for William and Harry with David Manning as their adviser. Manning accompanied him in January 2010 as he toured Auckland and Wellington; William opened the new building of the Supreme Court of New Zealand and was welcomed by a Māori chief.

By 2001, William was back in the United Kingdom and had enrolled at the University of St Andrews. Similar to his time at Eton, the media agreed not to invade William's privacy, and students were warned not to leak stories about him to the press. The extra attention did not deter him; he embarked on a degree course in Art History, later changing his main subject to Geography. William wrote his dissertation on the coral reefs of Rodrigues in the Indian Ocean and graduated with an undergraduate Master of Arts (MA Hons) degree with upper second class honours in 2005. While at university, he represented the Scottish national universities water polo team at the Celtic Nations tournament in 2004. He was known as "Steve" by other students to avoid any journalists overhearing and realising his identity. William returned to St Andrews alongside his wife in February 2011 as patron of the university's 600th Anniversary Appeal.

In 2001, William met Catherine Middleton while they were students in residence at St Salvator's Hall at the University of St Andrews. She reportedly caught William's attention at a charity fashion show on campus. The couple began dating in 2003. During their second year, William shared a flat with Middleton and two other friends. From 2003 to 2005, they both resided at Balgove House on the Strathtyrum estate with two roommates. In 2004, the couple briefly split but continued their relationship soon afterwards.

William and Catherine have owned two English Cocker Spaniels, named Lupo and Orla. William is the godfather of Prince Constantine Alexios of Greece and Denmark (b. 1998), a distant relation through his grandfather, the Duke of Edinburgh, and Mia Tindall (b. 2014), the eldest child of his paternal cousin, Zara Tindall.

William's parents divorced in 1996. Diana died in a car accident in the early hours of 31 August 1997. William, then aged 15, together with his 12-year-old brother and their father, was staying at Balmoral Castle at the time. William and Harry were informed of their mother's death by their father Prince Charles, the following morning. At his mother's funeral, William and his brother walked alongside their father, paternal grandfather Prince Philip, Duke of Edinburgh, and maternal uncle Charles Spencer, 9th Earl Spencer, behind the funeral cortège from Kensington Palace to Westminster Abbey.

William and his brother Harry inherited the "bulk" of the £12.9 million left by their mother on their respective 30th birthdays, a figure that had grown since her 1997 death to £10 million each in 2014. In 2002, The Times reported that William would also share with his brother a payment of £4.9 million from trust funds established by their great-grandmother, Queen Elizabeth The Queen Mother, on their respective 21st birthdays and would share a payment of £8 million upon their respective 40th birthdays. It was reported that Harry would inherit the bulk of the money left by the Queen Mother for the two brothers, as William is set to ascend to the throne which will bring him more financial benefits. As the eldest son of the King, William has inherited the Duchy of Cornwall, which brings him an additional income. According to a CNN report in 2014, the duchy is "a £760 million (about US$1.25 billion) entity established in 1337 to provide a private income for use by the reigning monarch's eldest son", which William inherited when his father became king in 2022.

The death of William's mother while being chased by paparazzi in 1997 has influenced his attitude towards the media. The Prince and his wife have asked that, when off-duty, their privacy should be respected.

On 3 June 1991, William was admitted to Royal Berkshire Hospital after being accidentally hit on the forehead by a fellow pupil wielding a golf club. He suffered a depressed fracture of the skull and was operated on at Great Ormond Street Hospital, resulting in a permanent scar. News of this incident spread quickly and media reporters descended on Ludgrove School to seek the name of the boy who had swung the golf club, but nobody divulged the name after the headmaster briefed his pupils and swore them to silence. In a 2009 interview, he dubbed the resulting scar a "Harry Potter scar" and said, "I call it that because it glows sometimes and some people notice it—other times they don't notice it at all". In 1999, he underwent an operation on his left hand after he broke a finger.

William became aware of HIV/AIDS in the mid-1990s when he accompanied his mother and brother on visits to shelters and clinics for patients. In January 2005, William and his brother volunteered at a British Red Cross aid distribution centre to pack emergency supplies for countries affected by the 2004 Boxing Day tsunami. In 2005, William worked in the children's unit at The Royal Marsden Hospital, his mother's former patronage, for two days of work experience; he also assisted in the medical research, catering, and fundraising departments. In May that year, he spent two weeks in North Wales with Mountain Rescue England and Wales (MREW). In May 2007, William became patron of MREW and president of The Royal Marsden Hospital, the latter of which was a role previously held by his mother.

William, Prince of Wales, KG, KT, PC, ADC (William Arthur Philip Louis; born 21 June 1982) is the heir apparent to the British throne. He is the elder son of King Charles III and his first wife Diana, Princess of Wales.

Prince William was born in London at St Mary's Hospital on 21 June 1982 as the first child of the Prince of Wales (later King Charles III) and his first wife, Diana, Princess of Wales, during the reign of his grandmother, Queen Elizabeth II. Buckingham Palace announced his name, William Arthur Philip Louis, on 28 June. On 4 August, the 82nd birthday of his paternal great-grandmother, Queen Elizabeth The Queen Mother, he was baptised in the Music Room of Buckingham Palace by the Archbishop of Canterbury, Robert Runcie. William had six godparents: former King Constantine II of Greece (his paternal second cousin once removed); Princess Alexandra, The Honourable Mrs Ogilvy (his paternal first cousin twice removed); the Duchess of Westminster; Lady Susan Hussey; Lord Romsey (his paternal second cousin once removed); and Sir Laurens van der Post.

In Scotland, the personal banner used since 1974 is based upon three ancient Scottish titles: Duke of Rothesay (heir apparent to the King of Scots), High Steward of Scotland and Lord of the Isles. The flag is divided into four quadrants like the arms of the Chief of Clan Stewart of Appin; the first and fourth quadrants comprise a gold field with a blue and silver checkered band in the centre; the second and third quadrants display a black galley on a silver field. The arms are differenced from those of Appin by the addition of an inescutcheon bearing the tressured lion rampant of Scotland; defaced by a plain label of three points Azure to indicate the heir apparent.

He was the first child born to a Prince and Princess of Wales since Prince John was born to Prince George and Princess Mary (later King George V and Queen Mary) in 1905. When he was nine months old, William accompanied his parents on their 1983 tour of Australia and New Zealand, as his first trip overseas. It was the first time that a royal baby was taken on an overseas tour, as in the past they would usually stay behind with their nannies. William's younger brother, Prince Harry, was born in 1984. William and Harry were raised at Kensington Palace in London, and Highgrove House in Gloucestershire. Known informally as "Wills" within the family, William was nicknamed "Willy" by his brother and "Wombat" by his mother, who wished him and his brother to obtain broader life experiences than those usually available to royal children. She took them to Walt Disney World and McDonald's, AIDS clinics, shelters for the homeless, and bought them items typically owned by teenagers, such as video games. Diana was reported to have described William as "my little wise old man" on whom she started to rely as her confidant by his early teens. William and Harry travelled to Canada on an official visit with their parents in 1991 and again with Prince Charles in 1998.

Through his mother, William descends from the Earls Spencer—a cadet branch of the Spencer family descended from the Earls of Sunderland; the senior branch are now also Dukes of Marlborough; the Barons Fermoy; and more anciently from Henry FitzRoy, 1st Duke of Grafton, and Charles Lennox, 1st Duke of Richmond—two illegitimate sons of King Charles II. As king, William would be the first monarch since the death of Anne in 1714 to undisputedly descend from Charles I and the first to descend from Charles II.

William was deployed to the Falkland Islands for a six-week tour with No. 1564 Flight from February to March 2012. The Argentine government condemned William's deployment to the islands close to the 30th anniversary of the beginning of the Falklands War as a "provocative act". In June 2012, Prince William gained a qualification to be captain or pilot in command of a Sea King rather than a co-pilot. His active service as an RAF search-and-rescue pilot ended in September 2013. He later became patron to the Battle of Britain Memorial Flight.