Paul Bettany was born in Harlesden, London, England, into a theatre family. His father, Thane Bettany, is still an actor, but his mother, Anne Kettle, has retired from acting. His maternal grandmother, Olga Gwynne (her maiden and stage name), was a successful actress, while his maternal grandfather, Lesley Kettle, was a musician and promoter. He has an older sister who is a writer. Paul was brought up in North West London and, after the age of nine, in Hertfordshire (Brookmans Park). Immediately after finishing at Drama Centre London, he went into the West End to join the cast of "An Inspector Calls", though when asked to go on tour with this play, he chose to stay in England.