Natalie Portman is starting to dish about her sex scene with co-star Mila Kunis

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What do you think of Natalie?

Natalie Portman once famously spoofed her good-girl reputation with an R-rated gangsta rap on SNL. But with her racy new movie, she may be turning her image around for real.

Portman is starting to dish about her sex scene with co-star Mila Kunis (from That '70s Show and Forgetting Sarah Marshall) in the upcoming thriller Black Swan. The two ladies play rival ballet dancers in a deadly competition -- who somehow find themselves in a lover's tryst.

"It's not raunchy, it's extreme," Portman told vmagazine of the love scene.

"Extreme" could mean a lot of things, but it sounds like a new direction for Portman. The 28-year-old actress is known for taking provocative roles, while being shy about sex scenes. While shooting the 2004 film Closer, Portman filmed a full-on striptease for a scene with Clive Owen -- then regretted it, and convinced director Mike Nichols to cut the nudity from the scene (It's still pretty racy, to be fair).

More recently, Portman got up the nerve to strip down with Jason Schwartzman for The Darjeeling Limited, but she was still pretty modest -- just showing her butt for a split second.

If the Black Swan sex scene is as "extreme" as Natalie claims, it will definitely top her last attempt at bad-girl behavior: a pretty chaste smooch with Scarlett Johansson at the Berlin premiere of The Other Boleyn Girl.

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