In August 2007, Boyd published her autobiography "Wonderful Today" the first child of Colin Ian Langdon Boyd and Diana Frances Boyd (née Drysdale). The Boyds moved to West Lothian in Scotland, where her brother, Colin, was born in 1946. They then moved to Guildford, Surrey, where her sister, Jenny Boyd, was born in 1947. Boyd's youngest sister, Paula, was born at a hospital in Nakuru, Kenya, in 1951. The Boyds lived in Nairobi from 1948 to 1953, after her father's discharge from the Royal Air Force. The family returned to England, where Boyd gained two half-brothers, David (b. 1954) and Robert Jr. (b. 1955), as well as two half-sisters, Clare (1962–2018) and Julia (b. 1964).