Acknowledging his last Oscar win, as a screenwriter for \"Good Will Hunting,\" Affleck said, \"I was really just a kid. I never thought I would be back here.\"
In the acting categories, Daniel Day-Lewis won the Oscar for best actor, being the first actor to three-peat in that category. As he accepted the award from Hollywood's greatest actress, Meryl Streep, he joked, \"I had actually been committed to play Margaret Thatcher. ... Meryl was Stephen's first choice for Lincoln.\"
He also thanked his wife, Rebecca Miller, for \"living with some very strange men,\" with each new role that he takes on.
\"She's the versatile one in the family and she's been the perfect companion to all of them,\" he said.
Jennifer Lawrence won the award for best actress. She tripped on the stairs on her way to accepting her award but picked herself up and made her way to the stage, earning a standing ovation.
For Full List of Winners
\"You're just standing up because you feel bad that I fell and that's embarrassing,\" she said, before rattling off a list of thank-yous and leaving the stage looking slightly stunned.
Watch Jennifer Lawrence's Oscar Tumble
\"Life of Pi,\" which had a total of 11 nominations, was another big winner of the night. Director Ang Lee took home the Oscar for best director over Steven Spielberg and David O. Russell.
\"Thank you, movie god,\" Lee said, accepting his award.
As expected, the film took home the first technical awards of the night for cinematography and visual effects. \"Life of Pi\" also won for best original score.
The first big acting awards of the night went to Christoph Waltz and Anne Hathaway in the supporting actor categories.
In one of the biggest tossups, Waltz claimed the award for supporting actor for his role in \"Django Unchained.\" It was his second Oscar for a Quentin Tarantino film; his first was for Tarantino's \"Inglourious Basterds.\"
PHOTOS: Stars on the Red Carpet
As expected, Hathaway took home the award for best supporting actress for her role as Fantine in \"Les Miserables.\"
\"It came true,\" she said, launching into a breathy speech, in which she thanked the cast and crew, her team and her husband. \"The greatest moment of my life was when you walked into it,\" she said.
Tarantino won the Oscar for best original screenplay for his slave revenge western \"Django Unchained.\" He thanked his cast.
\"I have to cast the right people,\" he said. \"And boy this time did I do it.\"
Chris Terrio won the award for best adapted screenplay for \"Argo,\" which also won for film editing.
For only the sixth time in Academy history, there was a tie at the Oscars. \"Zero Dark Thirty\" and \"Skyfall\" tied for sound editing.
See Other Ties in Academy History
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