 Caine had an elder maternal half-brother named David William Burchell, and a younger full brother, Stanley Micklewhite.He grew up in Southwark, London, and during the Second World War, he was evacuated to North Runcton near King's Lynn in Norfolk where he had a pet carthorse called Lottie.After the war, his father was demobilised, and the family were rehoused by the council in Marshall Gardens at the Elephant and Castle in a prefabricated house made in Canada, as much of London's housing stock had been damaged during the Blitz in 1940–1941