The Silver Linings Playbook star, 22, took a little fall on her way up to accept her statuette.
"Look at my dress!" she told reporters backstage after the show, of her Christian Dior Couture gown. "I tried to walk upstairs in this dress. That's what happened. I think I stepped on the fabric and they waxed the stairs."
There wasn't too much going through her head at the time of the tumble except "a bad word that starts with 'F'," she said with a laugh.
But it was more than her trip that put a strain on her day.
"The process today was so stressful," she said. "I felt like Steve Martin in Father of the Bride, watching my house being torn apart. And my whole family was getting ready. It was chaotic. I didn't eat today because I was so stressed. And then I was starving on the way over and that sucked."
But it sounds like matters were fixed for the smiling starlet, who jokingly apologized for taking a shot right before she chatted with press.