Jennifer Lawrence Wins Best Actress Oscar
Silver Linings Playbook star trips up on her way to the stage...
The 22-year-old star was awarded the movie world's most-prestigious award for her much-praised role in Silver Linings Playbook.
She plays a would-be dancer opposite Bradley Cooper in the romantic comedy - and the role has already netted her a Golden Globe and a SAG Award among other gongs.
J-Law, who was nominated two years ago for Winter's Bone, beat Emmanuelle Riva, Quvenzhané Wallis, Naomi Watts and Jessica Chastain to the award.
After tripping on her way to the stage, she said: "Thank you! These guys are just standing up because they feel bad that I fell and it's really embarrassing! This is nuts.
"Thank you to the Academy and to the women... not just those in my category, you've been so nice and this has been unforgettable."
The Hunger Games star had tripped over her Dior Couture gown's lengthy train as she ascended to the stage - prompting a nearby Hugh Jackman to leap to her aid.
Kristen Stewart had earlier arrived at the ceremony on crutches.
The night also saw Daniel Day-Lewis make Oscars history with a third Best Actor award.
Full list of The Oscars 2013 winners...
Best Motion Picture: Argo
Performance by an Actor in a Leading Role: Daniel Day-Lewis, Lincoln
Performance by an Actress in a Leading Role: Jennifer Lawrence, Silver Linings Playbook
Achievement in Directing: Ang Lee, Life of Pi
Performance by an Actress in a Supporting Role: Anne Hathaway, Les Miserables
Performance by an Actor in a Supporting Role: Christoph Waltz, Django Unchained
Original Song: "Skyfall," Adele Adkins & Paul Epworth; Skyfall
Best Animated Short Film: Paperman
Best Animated Feature Film: Brave
Achievement in Cinematography: Life of Pi, Claudio Miranda
Achievement in Visual Effects: Life of Pi
Achievement in Costume Design: Anna Karenina, Jacqueline Durran
Achievement in Makeup & Hairstyling: Les Misérables
Best Live-Action Short Film: Curfew
Best Documentary Short Subject: Inocente
Best Documentary Feature: Searching for a Sugar Man
Best Foreign-Language Film: Amour (Austria)
Achievement in Sound Mixing: Les Misérables
Achievement in Sound Editing: Zero Dark Thirty & Skyfall
Achievement in Film Editing: Argo
Achievement in Production Direction: Lincoln
Original Score: Life of Pi, Mychael Danna
Adapted Screenplay: Argo, Chris Terrio
Original Screenplay: Django Unchained, Quentin Tarantino