Jennifer Aniston adopted a strict diet to prepare for her stripping scene in 'We're The Millers'.

The 44-year-old actress ate plenty of vegetables and lean protein to prepare for her role as the forthcoming film's female lead, Rose O'Malley, and admits her only extravagance was snacking on the occasional kale chip when she suffered a junk food craving.

She told ''I did eat that day [of the underwear scenes]. I was on a very like, you know, greens and vegetables and lean proteins and kale.

''When I really wanted to have a cheat day, I had to have a kale chip.''

Jennifer's diet was part of a bid to maintain her lean figure as she is set to showcase her body in revealing underwear scenes in the comedy flick.

Although she bares all in the skimpy scenes, her skimpy wardrobe was doubled to make sure none of her assets slipped out.

Jennifer added: ''I had no taping. I really just doubled my bras. I had a thong and then two pairs of underwear. Why I thought that was going to help protect anything is beyond me.

''Because, that's just like ridiculous... I was like, 'No, I need three bras! I need three bras because God forbid that one, if it's gonna escape!' ''