Dakota Fanning Loves Being "A Really Bad Girl"

A very grown-up Dakota Fanning graces the cover of Teen Vogue next month, where she dishes on fashion, New Moon, and her BFF, Kristen Stewart.

"We became really close," Dakota says of her New Moon and Runaways co-star Kristen, "like we'd known each other for our whole lives. We talk all the time." And being that her character is at odds with Kristen's in the new Twilight film, Dakota felt that shooting some scenes were a little awkward. "Because I do know Kristen so well, being mean to her was really weird. It's like, Sorry, dude!"

Dakota also said playing Jane in New Moon was "really fun" because it was the first time she played a "really bad girl!" And it certainly wasn't the last!

Dakota also played Cherie Currie to Kristen's Joan Jett in Runaways, and says their real-life relationship mirrors the punk-rockers in the film. Well, "minus the destructive part."

But what's with good girl Dakota suddenly loving being a bad girl? Could Kristen's sullen and brooding ways be having an effect on sweet little Dakota?

Check out the video below for a peek behind-the-scenes of her photo shoot!