The Silver Linings Playbook actress admits that her embarrassing blunder at the Screen Actors Guild Awards in Los Angeles last week - when the skirt of her layered Dior gown fell down as she got up to accept the Best Actress award - shocked her just as much as it did viewers.
In an interview with the Daily Mail newspaper, she said: "It's the way the dress was structured. It's a tiered dress, which I didn't understand until I sat down and saw my thighs through sheer material and thought, 'What's going on?!' "
The 22-year-old starlet remained good humoured about the incident, however, and quipped that the dress "was supposed to do that".
She joked: "I planned it. I was concerned people would start talking about the award that I won and my acting, so I thought I'd pull a stunt just to get things back to where they need to be."
Although she is quick to laugh off her faux pas at the SAG Awards, the BAFTA-nominated beauty resents the term 'horse race', which has been used to describe the tight contest between her and her fellow Best Actress nominees - Dame Helen Mirren, Jessica Chastain, Emmanuelle Riva and Marion Cotillard - at the British film awards on February 10.
She explained: "As soon as you become a celebrity, you start feeling like a zoo animal. It's gross. People forget about your humanity when you become famous, so I'm not surprised that we're compared to a horse race."