A complete list of winners at the 84th annual Academy Awards:
Best picture: The Artist.
Actor: Jean Dujardin, The Artist.
Actress: Meryl Streep, The Iron Lady.
Supporting Actor: Christopher Plummer, Beginners.
Supporting Actress: Octavia Spencer, The Help.
Animated Feature: Rango
Art Direction: Hugo.
Costume Design: The Artist.
Direction: Michel Hazanavicius, The Artist.
Film Editing: The Girl with the Dragon Tattoo.
Foreign Language: A Separation, Iran.
Make Up: The Iron Lady.
Music, original score: The Artist.
Music, original song: Man or Muppet from The Muppets.
Screenplay, adapted: The Descendants.
Screenplay, original: Midnight in Paris.
Short, animated: The Fantastic Flying Books of Mr. Morris Lessmore.
Short, documentary: Saving Face.
Short, live action: The Shore.
Sound Editing: Hugo.
Sound Mixing: Hugo.
Visual Effects: Hugo.