His work as a voice actor includes Thurgood Stubbs in "The PJs", Donkey in the "Shrek" series and the dragon Mushu in Disney's "Mulan". In some of his films, he plays multiple roles in addition to his main character, intended as a tribute to one of his idols Peter Sellers, who played multiple roles in "Dr. Strangelove" and elsewhere. Murphy has played multiple roles in "Coming to America", Wes Craven's "Vampire In Brooklyn", the "Nutty Professor" films (where he played the title role in two incarnations, plus his father, brother, mother and grandmother), "Bowfinger" and 2007's "Norbit".