C. J. de Mooi

According to De Mooi, he adopted his new name whilst modelling and is quoted as saying "I no longer wanted to be associated with my family". De Mooi translates from Dutch to mean "the pretty"; it is not an uncommon Dutch family name. He currently resides in Wales with his civil partner Andrew Doran. De Mooi is teetotal and a vegetarian of over three decades; in April 2018 he announced on Twitter he was going vegan.

In October 2018, De Mooi was declared bankrupt following lengthy legal proceedings in connection with the arrest.

In 2016, De Mooi was accused of sexual assault but was subsequently cleared. He stated that he had been dismissed from Eggheads and had relocated to South Africa, to pursue a career in acting. In September 2016 he was arrested on suspicion of a murder allegedly committed in 1988, under a European Arrest Warrant issued in the Netherlands, regarding claims reported to have been made in his autobiography.

In October 2016, a judge at Westminster Magistrates' Court declined the extradition request and said a European arrest warrant should never have been issued.

On 21 September 2016, De Mooi was arrested at Heathrow Airport in connection with claims, which he had reportedly made in his autobiography, that in 1988 he had punched a drug-addicted mugger and thrown him into a canal in Amsterdam. De Mooi was detained under a European Arrest Warrant issued in the Netherlands. A judge at Westminster Magistrates' Court declined the extradition request on technical grounds, on 24 October 2016, saying that no UK arrest warrant had been issued.

In 2015 he ran in the London Marathon for Shooting Star CHASE, a children's hospice, finishing in 2 hours 58 minutes 30 seconds.

In December 2011, De Mooi announced he had left Eggheads permanently to pursue an acting career. He appeared in broadcast episodes until August 2012 and was replaced on the show by Dave Rainford. However, he returned to a new, short-lived format of Eggheads in 2014 called Revenge of the Egghead. He stated he returned because of his 'love of the show'. He then returned to the main version of Eggheads replacing Daphne Fowler.

De Mooi moved into professional acting full-time in 2011 and has appeared in plays, musicals and pantomimes. In 2014, he performed in and produced two plays by Harvey Fierstein in London's West End and was then cast in the Lazarus Theatre productions of Troilus and Cressida and Coriolanus. He also completed filming on his movie debut, a nine-minute short entitled The Renata Road, which was filmed in 2011 and put out on release in 2014 with a showing at Cannes International Film Festival in 2015.

He challenged six former professional snooker players during the 2010 World Snooker Championship to test his snooker knowledge against their knowledge of chosen specialist subjects. He won all but one round, John Parrott being the only player to get the better of him.

In September 2010 he was very outspoken as a delegate to the FIDE (the World Chess Federation)'s presidential elections. De Mooi described the events, which saw Kirsan Ilyumzhinov re-elected over Anatoly Karpov, as "a farce of a vote", going on to declare: "You wouldn't believe the blatant breaking of rules and FIDE's written statutes. It's amazing. There wasn't even a pretence of fairness and free speech." According to De Mooi, Ilyumzhinov, the federation's president for 15 years, had refused to allow Karpov's supporters to address the general assembly meeting, but turned off their microphones and carried on speaking himself and ignored legal points raised from the floor, eventually storming off stage with the federation's ruling board.

De Mooi ran in the 2009 London Marathon raising money for Amnesty International. He also competed in the 2012 London Marathon, completing with a time of 3 hours 16 minutes and 30 seconds.

As part of the Cardiff Lesbian, Gay, Bisexual and Transgender Mardi Gras in March 2007, De Mooi acted as host of a quiz night. He also hosted a quiz at the June 2010 conference of the British Humanist Association. In 2013, De Mooi published his first book, entitled How to Win TV Quiz Shows.

In 2000, De Mooi applied to several game and quiz television shows as a contestant and stood out for being outspoken (his tirade when voted off the Weakest Link has been featured on the show's website, video and led to a "bad losers" show which he eventually won). He has also appeared on numerous other quiz shows including Fifteen to One, Countdown, Beat the Nation and 100%.

De Mooi was a club chess player from 1990 to 2009, representing Hammersmith Chess Club in West London. At the peak his chess rating was 158 ECF, equivalent to Elo 1885. In 2010 he was elected President of the English Chess Federation.

On a self-recorded YouTube video, De Mooi says he had a highly abusive childhood, causing him to run away from home shortly after his seventeenth birthday and become homeless beginning in Rotherham and Sheffield. The video describes how he travelled to London, jumped on a ferry to Amsterdam and later moved on to Cologne, where a chance encounter outside a gay bar led to the beginnings of his modelling career. De Mooi was reported to have stated in his autobiography that in 1988 he assaulted a man who was attempting to mug him by punching and shoving him into a canal in Amsterdam.

He has been living with HIV since the late 1980s. In April 2019, De Mooi posted on Twitter about his health and about his financial and professional problems and a GoFundMe campaign was launched, saying he is "bankrupt, extremely ill and in imminent danger of losing his house."

Connagh Joseph "C. J." de Mooi (pronounced [də moːi̯] ; born Andrew Paul Booth on 5 November 1969) is a British professional quizzer and television personality. He first appeared on television quiz show Eggheads in 2003, as one of five original members of the show's eponymous team.