Work it! Gwyneth Paltrow strips down to her underwear in a scene for her new film Thanks for Sharing.

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Gwyneth plays Phoebe, a woman who embarks on a relationship with Mark Ruffalo's character Adam, a recovering sex addict.

After discovering her new boyfriend's secret, she struggles (and strips) to understand him and come to grips with his issues. Meanwhile, he's doing the best he can to just take his recovery one day at a time.

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Despite the heavy subject matter, "It's a very funny movie," says Gwyneth of the film, which also includes Pink (in her big screen debut!), Tim Robbins, Joely Richardson and the up-and-coming actor Josh Gad.

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Will you go see "Thanks for Sharing" when it opens in theaters on September 20? Tell us in the comments section or on Twitter @OKMagazine.

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