Jennifer Aniston credits kale as the reason she was able to get into supermodel shape for her role as a stripper in her new movie, We're the Millers.

The 44-year-old, who wears nothing but a bra and panties for one scene, opened up about the strict diet.

"I did eat that day," she told Access Hollywood. "I was on a very like, you know, greens and vegetables and lean proteins and kale."

Aniston, who filmed in just her underwear for one scene, didn't even allow herself a single indulgence.

"When I really wanted to have a cheat day I had to have a kale chip," she revealed.

The film centers around veteran pot dealer (Jason Sudeikis), who creates a fake family as part of his plan to move a huge shipment of weed into the U.S. from Mexico. Aniston plays a stripper who must act like a dedicated wife and mother.

Aniston went on to admit she was nervous about exposing her "kibbles and bits" during the racy scenes.

"That was some major strapping and organizing," she said of her wardrobe for the scene that shows Jen in her bra and underwear.

"I had no taping. I really just doubled my bras. I had a thong and then two pairs of underwear," Jen continued.

"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!'" she said.

We’re the Millers opens in theaters on August 7. Watch the official movie trailer: