Los Angeles: Superhero satire 'Birdman' is leading the nomination list for the 21st Annual Screen Actors Guild Awards, with four nods, followed by 'Boyhood' and 'The Imitation Game', with three each.

'Birdman' about a once high-flying superhero actor, who is trying to rebuild his career with a Broadway play, earned Michael Keaton the best male actor nomination, Edward Norton received a best supporting male actor nod, and Emma Stone, who plays Keaton's daughter, picked up a nod for best supporting female actor. The film was also nominated for best ensemble.