David Ormsby-Gore, 5th Baron Harlech

Lord Harlech was seriously injured in a car crash at Montford Bridge near Shrewsbury on the evening of 25 January 1985 and died at the Royal Shrewsbury Hospital the following morning, aged 66. Senator Edward Kennedy, Jacqueline Onassis and other Kennedy family members attended his funeral and interment in Llanfihangel-y-traethau. He was succeeded in the barony by his second and only surviving son, Francis.

Ormsby-Gore was portrayed by Peter Donat in the 1974 television play The Missiles of October, which was about the October 1962 Cuban Missile Crisis.

On 11 December 1969, Lord Harlech married American socialite Pamela Colin, daughter of a Manhattan top corporate lawyer, herself a London resident editor of Vogue and then food editor of the British Vogue. The wedding was attended by Princess Margaret, the Duke and Duchess of Devonshire, the Earl and Countess of Drogheda, the Earl and Countess of Airlie, The Countess Gowrie, Lord and Lady David Cecil, Sir Fitzroy Maclean, J. J. Astor and Michael Astor. They had one daughter:

Ormsby-Gore knew Kennedy well from his time in London, where his father Joseph P. Kennedy had served as American Ambassador. Like Macmillan, Ormsby-Gore was distantly related to Kennedy, but had a closer relationship than did Macmillan with the President-elect and his brother Robert. Six months after Kennedy took office Ormsby-Gore was in Washington, D.C. Referred to under the Kennedy administration as "our kind of Ambassador", he supplied Kennedy with a stream of advice and Cuban cigars via his diplomatic bag. He was almost a resident at the White House, being more a friend of the family than a mere ambassador. After President Kennedy's assassination there were rumours of a romance between Ormsby-Gore and Jacqueline Kennedy. In 1968 he proposed marriage to her, but, she did not accept. Ormsby-Gore was one of the pallbearers at Robert F. Kennedy's funeral along with Robert McNamara, John Glenn, W. Averell Harriman, C. Douglas Dillon, Kirk Lemoyne Billings (schoolmate of John F. Kennedy), Stephen Edward Smith (husband to Jean Ann Kennedy), David Hackett, Jim Whittaker and John Seigenthaler. Under the Lyndon B. Johnson administration relations were more formal but remained excellent; and Ormsby-Gore maintained his position after the Labour government took power in Britain in 1964.

In 1968, Lord Harlech proposed to the widowed Jacqueline Kennedy, whom he had been friends with since before her husband's assassination. Jacqueline Kennedy declined his offer of marriage in a letter, writing: "If ever I can find some healing and some comfort — it has to be with somebody who is not part of all my world of past and pain ... I can find that now if the world will let us." She later married Aristotle Onassis.

Ormsby-Gore retired as ambassador in 1965, a year after his father died, and took his seat in the House of Lords as Lord Harlech, briefly also holding the position of deputy chairman of the Conservative Party. He also had a successful career as a television executive, founding HTV, and served as president of the British Board of Film Classification. He had an active interest in the avant-garde, and for nearly ten years, beginning in 1969, was patron of the Institute for Research in Art and Technology. In 1971–1972, he was a deputy chairman of the Pearce Commission.

The friendships of Ormsby-Gore and Macmillan with John F. Kennedy helped secure the first Test-Ban Treaty in 1963. Macmillan and Ormsby-Gore had been attempting to achieve a test-ban treaty with the Russians for the past ten years, and won Kennedy over through letters from Macmillan and frank discussions between Ormsby-Gore and Kennedy. They convinced him to act like a statesman and conclude Test-ban treaties with Russia and not fear being branded as an appeaser by political opponents in the United States.

According to the Duchess of Devonshire, who travelled with the British delegation to Kennedy's funeral in November 1963, Macmillan's successor as Prime Minister Alec Douglas-Home had wanted to appoint Ormsby-Gore as Foreign Secretary, but R. A. Butler had insisted on having this post as a condition of serving under Home. After Kennedy's assassination, Ormsby-Gore became involved in a relationship with his widow Jacqueline, going on vacation with her in Cambodia. He proposed marriage to her in 1967 and was turned down. In 1968, when she married the Greek shipping tycoon Aristotle Onassis, Lord Harlech was opposed and wrote to her asking her to change her mind.

At the 1950 general election, he was elected Member of Parliament for Oswestry, which he remained until 1961. Under Prime Minister Anthony Eden he served briefly, from November 1956 to January 1957, as Parliamentary Under-Secretary of State for Foreign Affairs; and under Prime Minister Harold Macmillan he was from 1957 to 1961 Minister of State for Foreign Affairs. After the election of U.S. President John F. Kennedy he was appointed British Ambassador to the United States on 18 October 1961. This meant that he had to take the Chiltern Hundreds on 1 June, so that he could resign from the House.

Ormsby-Gore was appointed to be a Deputy Lieutenant of Shropshire on 12 April 1961. As the British Ambassador to the United States, he was, on 29 June 1961, appointed to the Order of St Michael and St George as a Knight Commander (KCMG). In 1962, he was appointed to the Order of St John as a Knight (KStJ).

After the war, his father handed over to him all his land, and Ormsby-Gore farmed the 400 acres (1.6 km²) of the Woodhill Estate, Oswestry, Shropshire. In 1948, he was commissioned a Major in the Shropshire Yeomanry, but left in 1950.

On 9 February 1940, Lord Harlech married Sylvia Lloyd Thomas (1920–1967) daughter of Hugh Lloyd Thomas, Envoy Extraordinary and Minister Plenipotentiary to France between 1935 and 1938, and Guendaline Ada Bellew. Before Lady Harlech's death in an automobile accident on 30 May 1967, they had five children:

In 1939, he was commissioned into the Royal Artillery (Berkshire Yeomanry Field Regiment), served in the 'Phantom' reconnaissance unit, and worked with airborne and other special units. By the end of the War, he held the rank of major on the general staff.

William David Ormsby-Gore, 5th Baron Harlech KCMG PC DL (20 May 1918 – 26 January 1985), known as David Ormsby-Gore until June 1961 and as Sir David Ormsby-Gore from then until February 1964, was a British diplomat and Conservative politician.

William David Ormsby-Gore was born into an Anglo-Irish aristocratic family on 20 May 1918 in Westminster, London, the second son of William Ormsby-Gore, 4th Baron Harlech, a Conservative politician, and Lady Beatrice Edith Mildred Gascoyne-Cecil. His maternal great-grandfather was British Prime Minister The 3rd Marquess of Salisbury. He was educated at St Cyprian's School, Eton College and New College, Oxford.