Rose Byrne pretended to be Gisele Bündchen when she was filming scenes for Get Him to the Greek.
The Australian actress became anxious when she discovered she had to wear a series of revealing outfits - including a pair of tiny shorts - for her role in the new comedy.
Rose is best known for her work in TV drama Damages, so decided the only way to get through the scenes and feel confident about her body was to imagine she was a Brazilian supermodel. Once she began to feel like a catwalk queen, the star found the sexy clothes easier to wear.
"I've just got to pretend that I've got a body like Gisele's and that's that," the 30-year-old beauty said in the July issue of Vogue Australia. "It was so funny, just the things I would be wearing, these incredibly tight, revealing shorts."