The full list of 2012 Oscar winners

Los Angeles - The winners of the the 84th annual Academy Awards, held at the Kodak Theatre in Hollywood, and hosted by Billy Crystal.

Best Picture
The Artist

Actress in a Leading Role
Meryl Streep in The Iron Lady

Actor in a Leading Role
Jean Dujardin in The Artist

Best Actor in a Supporting Role
Christopher Plummer in Beginners

Best Actress in a Supporting Role
Octavia Spencer in The Help

Best Director
The Artist - Michel Hazanavicius

Writing (Adapted Screenplay)
The Descendants - Screenplay by Alexander Payne and Nat Faxon and Jim Rash

Writing (Original Screenplay)
Midnight in Paris - Written by Woody Allen

Animated Feature Film
Rango - Gore Verbinski

Documentary (Feature)
Undefeated - TJ Martin, Dan Lindsay and Richard Middlemas

Music (Original Score)
The Artist - Ludovic Bource

Music (Original Song)
Man or Muppet from The Muppets - Music and Lyric by Bret McKenzie

Film Editing
The Girl with the Dragon Tattoo - Kirk Baxter and Angus Wall

Sound Editing
Hugo - Philip Stockton and Eugene Gearty

Sound Mixing
Hugo - Tom Fleischman and John Midgley

Art Direction
Hugo - Production Design: Dante Ferretti; Set Decoration: Francesca Lo Schiavo

Costume Design
The Artist - Mark Bridges

Cinematography
Hugo - Robert Richardson

Visual Effects
Hugo - Rob Legato, Joss Williams, Ben Grossman and Alex Henning

Foreign Language Film
A Separation - Iran

Make-up
The Iron Lady - Mark Coulier and J. Roy Helland

Costume Design
The Artist - Mark Bridges

Short Film (Live Action)
The Shore Terry George and Oorlagh George

Documentary (Short Subject)
Saving Face - Daniel Junge and Sharmeen Obaid-Chinoy

Short Film (Animated)
The Fantastic Flying Books of Mr. Morris Lessmore - William Joyce and Brandon Oldenburg