Gambon married Anne Miller when he was 22, but has always been secretive about his personal life. The couple live together in a country house in Kent. Gambon was invested by Prince Charles as a Knight Bachelor on 17 July 1998 for services to drama (Queen Elizabeth II's approval for the award was notified in the 1998 New Year Honours List) and his wife thus became Lady Gambon. The couple have a son, Fergus, who appears as an expert on the BBC's "Antiques Roadshow".