Lord Ivar Mountbatten

Although he is not a member of the British royal family proper, he is the first member of the British monarch's extended family openly in a same-sex relationship, and upon marrying his partner James Coyle in 2018 was the first to have a same-sex wedding.

In September 2016, Mountbatten revealed that he was in a relationship with James Coyle, an airline cabin services director whom he met while at a ski resort in Verbier. On 22 September 2018 they were married in a private ceremony on Mountbatten's estate of Bridwell Park. Mountbatten's former wife walked him down the aisle and 'gave him away' at the suggestion of their children.

The couple separated in September 2010 and divorced amicably in November 2011. In 2015, he converted their former home, Bridwell Park, into an exclusive-use venue for weddings, corporate functions, and business events.

Mountbatten is one of the godfathers of Lady Louise Windsor (born 2003), the daughter of Prince Edward and his wife, Sophie.

Mountbatten married Penelope Anne Vere Thompson (born Salisbury, Wiltshire, 17 March 1966), only daughter of Colin Graham Thompson of Old Manor House, Sutton Veny, Wiltshire, and wife Rosemary Vere Edwardes. The ceremony took place on 23 April 1994 at the Church of Saint Peter and Saint Paul in Clare, Suffolk. They have three daughters:

Lord Ivar Alexander Michael Mountbatten, DL (born 9 March 1963) is a British aristocrat, farmer and geologist. He is a third cousin, once removed of Queen Elizabeth II and a first cousin, once removed of Prince Philip, Duke of Edinburgh.