Kenneth Williams: Fantabulosa! is a 2006 BBC Four television play starring Michael Sheen as the English comic actor Kenneth Williams, based on Williams' own diaries. Cheryl Campbell plays Williams's mother, Lou. Michael Sheen performed extensive research for the role, watching archive footage and reading books. He also followed the cabbage soup diet to lose 2.5 stone (35 lb; 16 kg) to play Williams. Sheen's performance won a Royal Television Society award for Best Male Actor, and the play also won two BAFTA nominations (best single play and best actor, Michael Sheen).