The following is a list of the winners in all categories at the 84th Academy Awards.
- Best picture: The Artist.
- Best director: Michel Hazanavicius for The Artist.
- Best leading actor: Jean Dujardin in The Artist.
- Best leading actress: Meryl Streep in The Iron Lady.
- Best supporting actor: Christopher Plummer in Beginners.
- Best supporting actress: Octavia Spencer in The Help.
- Best foreign language film: A Separation (Iran).
- Best animated feature: Rango.
- Best original screenplay: Midnight in Paris.
- Best adapted screenplay: The Descendants.
- Best original score: The Artist.
- Best original song: Man or Muppet from The Muppets.
- Best art direction: Hugo.
- Best cinematography: Hugo.
- Best costume design: The Artist.
- Best documentary feature: Undefeated.
- Best documentary short: Saving Face.
- Best film editing: The Girl with the Dragon Tattoo.
- Best makeup: The Iron Lady.
- Best short animated film: The Fantastic Flying Books of Mr Morris Lessmore.
- Best short live action film: The Shore.
- Best sound editing: Hugo.
- Best sound mixing: Hugo.
- Best visual effects: Hugo.
Most Oscars won
The Artist - 5
Hugo - 5
The Iron Lady - 2
Beginners - 1
The Help - 1
Midnight in Paris - 1
The Descendants - 1
A Separation - 1
The Girl with the Dragon Tattoo - 1
Undefeated - 1
The following nominated films failed to win any awards:
Harry Potter and the Deathly Hallows Part 2
Tinker Tailor Soldier Spy
Transformers: Dark of the Moon
The Tree of Life
Extremely Loud and Incredibly Close
My Week with Marilyn