This list includes winners of the 84th Academy Awards (also known as Oscars) held in 26th February 2012 that honored best films of 2011; source is wikipedia in English.
Best Picture
The Artist - WINNER
The Descendants
Extremely Loud and Incredibly Close
The Help
Hugo
Midnight in Paris
Moneyball
The Tree of Life
War Horse
Best Director
Michel Hazanavicius – The Artist - WINNER
Woody Allen – Midnight in Paris
Terrence Malick – The Tree of Life
Alexander Payne – The Descendants
Martin Scorsese – Hugo
Best Actor
Jean Dujardin – The Artist as George Valentin - WINNER
Demián Bichir – A Better Life as Carlos Galindo
George Clooney – The Descendants as Matt King
Gary Oldman – Tinker Tailor Soldier Spy as George Smiley
Brad Pitt – Moneyball as Billy Beane
Best Actress
Meryl Streep – The Iron Lady as Margaret Thatcher - WINNER
Glenn Close – Albert Nobbs as Albert Nobbs
Viola Davis – The Help as Aibileen Clark
Rooney Mara – The Girl with the Dragon Tattoo as Lisbeth Salander
Michelle Williams – My Week with Marilyn as Marilyn Monroe
Best Supporting Actor
Christopher Plummer – Beginners as Hal Fields - WINNER
Kenneth Branagh – My Week with Marilyn as Laurence Olivier
Jonah Hill – Moneyball as Peter Brand
Nick Nolte – Warrior as Paddy Conlon
Max von Sydow – Extremely Loud and Incredibly Close as The Renter
Best Supporting Actress
Octavia Spencer – The Help as Minny Jackson - WINNER
Bérénice Bejo – The Artist as Peppy Miller
Jessica Chastain – The Help as Celia Foote
Melissa McCarthy – Bridesmaids as Megan Price
Janet McTeer – Albert Nobbs as Hubert Page
Best Original Screenplay
Midnight in Paris – Woody Allen - WINNER
The Artist – Michel Hazanavicius
Bridesmaids – Kristen Wiig and Annie Mumolo
Margin Call – J. C. Chandor
A Separation – Asghar Farhadi
Best Adapted Screenplay
The Descendants – Alexander Payne, Nat Faxon, and Jim Rash from The Descendants by Kaui Hart Hemmings - Winner
Hugo – John Logan from The Invention of Hugo Cabret by Brian Selznick
The Ides of March – George Clooney, Grant Heslov, and Beau Willimon from Farragut North by Beau Willimon
Moneyball – Screenplay by Steven Zaillian and Aaron Sorkin; Story by Stan Chervin from Moneyball by Michael Lewis
Tinker Tailor Soldier Spy – Bridget O'Connor and Peter Straughan from Tinker, Tailor, Soldier, Spy by John le Carré
Best Animated Feature
Rango – Gore Verbinski
A Cat in Paris – Alain Gagnol and Jean-Loup Felicioli
Chico and Rita – Fernando Trueba and Javier Mariscal
Kung Fu Panda 2 – Jennifer Yuh Nelson
Puss in Boots – Chris Miller
Best Foreign Language Film
A Separation (Iran) in Persian – Asghar Farhadi
Bullhead (Belgium) in Dutch and French – Michaël R. Roskam
Footnote (Israel) in Hebrew – Joseph Cedar
In Darkness (Poland) in Polish – Agnieszka Holland
Monsieur Lazhar (Canada) in French – Philippe Falardeau
Best Documentary - Feature
Undefeated – TJ Martin, Dan Lindsay, and Richard Middlemas
Hell and Back Again – Danfung Dennis and Mike Lerner
If a Tree Falls: A Story of the Earth Liberation Front – Marshall Curry and Sam Cullman
Paradise Lost 3: Purgatory – Joe Berlinger and Bruce Sinofsky
Pina – Wim Wenders and Gian-Piero Ringel
Best Documentary – Short Subject
Saving Face – Sharmeen Obaid-Chinoy and Daniel Junge - WINNER
The Barber of Birmingham: Foot Soldier of the Civil Rights Movement – Robin Fryday and Gail Dolgin
God Is the Bigger Elvis – Rebecca Cammisa and Julie Anderson
Incident in New Baghdad – James Spione
The Tsunami and the Cherry Blossom – Lucy Walker and Kira Carstensen
Best Live Action Short Film
The Shore – Terry George and Oorlagh George - WINNER
Pentecost – Peter McDonald and Eimear O'Kane
Raju – Max Zähle and Stefan Gieren
Time Freak – Andrew Bowler and Gigi Causey
Tuba Atlantic – Hallvar Witzø
Best Animated Short Film
The Fantastic Flying Books of Mr. Morris Lessmore – William Joyce and Brandon Oldenburg - WINNER
Dimanche – Patrick Doyon
La Luna – Enrico Casarosa
A Morning Stroll – Grant Orchard and Sue Goffe
Wild Life – Amanda Forbis and Wendy Tilby
Best Original Score
The Artist – Ludovic Bource - WINNER
The Adventures of Tintin – John Williams
Hugo – Howard Shore
Tinker Tailor Soldier Spy – Alberto Iglesias
War Horse – John Williams
Best Original Song
"Man or Muppet" from The Muppets – Bret McKenzie - WINNER
"Real in Rio" from Rio – Sérgio Mendes, Carlinhos Brown, and Siedah Garrett
Best Sound Editing
Hugo – Philip Stockton and Eugene Gearty - WINNER
Drive – Lon Bender and Victor Ray Ennis
The Girl with the Dragon Tattoo – Ren Klyce
Transformers: Dark of the Moon – Ethan Van der Ryn and Erik Aadahl
War Horse – Richard Hymns and Gary Rydstrom
Best Sound Mixing
Hugo – Tom Fleischman and John Midgley - WINNER
The Girl with the Dragon Tattoo – David Parker, Michael Semanick, Ren Klyce, and Bo Persson
Moneyball – Deb Adair, Ron Bochar, David Giammarco, and Ed Novick
Transformers: Dark of the Moon – Greg P. Russell, Gary Summers, Jeffrey J. Haboush, and Peter J. Devlin
War Horse – Gary Rydstrom, Andy Nelson, Tom Johnson, and Stuart Wilson
Best Art Direction
Hugo – Dante Ferretti and Francesca Lo Schiavo - WINNER
The Artist – Laurence Bennett and Robert Gould
Harry Potter and the Deathly Hallows – Part 2 – Stuart Craig and Stephenie McMillan
Midnight in Paris – Anne Seibel and Hélène Dubreuil
War Horse – Rick Carter and Lee Sandales
Best Cinematography
Hugo – Robert Richardson - WINNER
The Artist – Guillaume Schiffman
The Girl With the Dragon Tattoo – Jeff Cronenweth
The Tree of Life – Emmanuel Lubezki
War Horse – Janusz Kamiński
Best Makeup
The Iron Lady – Mark Coulier and J. Roy Helland - WINNER
Albert Nobbs – Martial Corneville, Lynn Johnson, and Matthew W. Mungle
Harry Potter and the Deathly Hallows – Part 2 – Nick Dudman, Amanda Knight, and Lisa Tomblin
Best Costume Design
The Artist – Mark Bridges - WINNER
Anonymous – Lisy Christl
Hugo – Sandy Powell
Jane Eyre – Michael O'Connor
W.E. – Arianne Phillips
Best Film Editing
The Girl with the Dragon Tattoo – Angus Wall and Kirk Baxter - WINNER
The Artist – Anne-Sophie Bion and Michel Hazanavicius
The Descendants – Kevin Tent
Hugo – Thelma Schoonmaker
Moneyball – Christopher Tellefsen
Best Visual Effects
Hugo – Rob Legato, Joss Williams, Ben Grossmann, and Alex Henning - WINNER
Harry Potter and the Deathly Hallows – Part 2 – Tim Burke, David Vickery, Greg Butler, and John Richardson
Real Steel – Erik Nash, John Rosengrant, Danny Gordon Taylor, and Swen Gillberg
Rise of the Planet of the Apes – Joe Letteri, Dan Lemmon, R. Christopher White, and Daniel Barrett
Transformers: Dark of the Moon – Scott Farrar, Scott Benza, Matthew E. Butler, and John Frazier
