By Adam Markovitz
Updated April 20, 2011 at 02:00 PM EDT
Friends Benefits Timberlake
Credit: David Giesbrecht

What’s the fun of summer if you don’t show a little skin? In EW’s Summer Movie Preview (now on stands), Justin Timberlake and Mila Kunis open up about ditching their clothes in the upcoming Friends with Benefits (out July 22). Both actors bare their behinds in R-rated rom-com, which stars Timberlake as a magazine art director who tries to keep messy emotions out of his relationship with an ambitious corporate head hunter (Kunis).

After three straight weeks of love scenes, Kunis says she simply stopped caring about coming to set and dropping trou. “I got used to showing up to work at 5 a.m. and having my makeup artist put me in my little pasties and airbrush me, and then walking to set and dropping my robe,” Kunis tells EW exclusively. “It got to be the norm in a weird way.”

But Timberlake is still hoping to minimize his on-screen exposure. “I’m trying to cut down my a– time [in the film],” says the actor. “I’m slowly chipping away in the editing room every time I can get on the Sony lot. Because it’s my ass, dude!”

For more on Friends With Benefits and 100 other summer movies, check out Entertainment Weekly‘s Summer Movie Preview issue, on newsstands now.

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