Spall, third of four sons, was born in Battersea, London; his father, Joe, was a postal worker, and his mother, Sylvia, a hairdresser. He trained at the National Youth Theatre and RADA, where he was awarded the Bancroft Gold Medal as the most promising actor in his year. His brother, Matthew, is studio director of the computer games company Morpheme.　　Initially notable in the United Kingdom for playing the gormless Barry Taylor in all five series of Auf Wiedersehen, Pet, Kevin in Outside Edge and as Aubrey the appalling chef in Mike Leigh's Life is Sweet, Spall has since appeared in films such as Crusoe, Secrets & Lies, Shooting the Past, Vanilla Sky, Rock Star, The Last Samurai, Lemony Snicket's A Series of Unfortunate Events and The King's Speech. He gained international recognition as Peter Pettigrew ("Wormtail") in Harry Potter and the Prisoner of Azkaban, Harry Potter and the Goblet of Fire, Harry Potter and the Half-Blood Prince and Harry Potter and the Deathly Hallows. In 1991 he guest starred in the series 5 Red Dwarf episode Back to Reality. In 1993, Spall was in Rab C Nesbitt.　　Spall performed lead vocals on the song The Devil Is An Englishman from the Ken Russell film Gothic (1986), in which Spall portrayed John William Polidori.　　Spall played the starring role of Albert Pierrepoint in the 2005 film Pierrepoint, which was released as The Last Hangman in the United States. In the 2006 video game Grand Theft Auto: Vice City Stories, Spall voiced Phil Collins' manager, Barry Mickelthwaite. In 2007, he starred as Nathaniel in Disney's Enchanted and Beadle Bamford in Tim Burton's production of Sweeney Todd: The Demon Barber of Fleet Street. He also starred as Georgie Godwin in a one-off television drama The Fattest Man in Britain on ITV 1 which aired on the 20th December 2009. The drama also featured Bobby Ball, Frances Barber, Aisling Loftus, and Jeremy Kyle.　　In 2010 he portrayed Winston Churchill in critically acclaimed film The King's Speech for which as a member of the ensemble he was jointly awarded the Screen Actors Guild Award for Outstanding Performance by a Cast in a Motion Picture.　　On 31 December 1999, he was made an Officer of the Order of the British Empire (OBE).