From WENN.com

The actress attended the ceremony in Los Angeles on Sunday (27Jan13) and scooped the prestigious award for Outstanding Performance by a Female Actor in a Leading Role for her turn in Silver Linings Playbook.

However, Lawrence's big moment was almost ruined when she stood up to walk to the stage and the bottom half of her Christian Dior dress detached and slipped down, leaving her thighs on display.

The embarrassing moment was caught on camera, but the actress gamely smiled as she adjusted the garment to spare her blushes before taking to the stage.