Based on a play of the same title by Louis Mellis and David Scinto, Gangster No.1 follows the rise and falls of a particularly prominent and ruthless English gangster. Paul Bettany (A Beautiful Mind, Iron Man) stars in the titular role- the jaw dropping and merciless enforcer whilst David Thewlis (Harry Potter, War Horse) plays his influential boss and gang leader, Freddie Mays. Ruthless.