We'll get to that kiss in a second, but first let's note the other hot thing about The Runaways.
The outfits that Kristen Stewart and Dakota Fanning wear are nothing short of spectacular. We're talking cha-cha heels, skintight bodysuits, lots of sequins and just about anything else you can think of when it comes to the drugs, sex and rock 'n' roll era of the '70s.
"I kept all the wardrobe," Fanning told reporters at the movie's Sundance Film Festival premiere. "I can break it out again some day."
Can't wait. So OK, risqué clothing wasn't the only naughty thing going on in the movie...
In one scene, Fanning and Stewart lock lips. It's pretty cool just how OK these two actresses are about same-sex smooching.
"It wasn't that big of a deal," Fanning said. "It's just another part of the story."
Michael Shannon had to spew some rather colorful—and, well, pornographic—words playing Kim Fowley, the eccentric music producer who created Joan Jett's legendary all-girl rock band in 1975.
"That's the way that guy talks," Shannon said when asked if he ad-libbed any of his cuss-filled rants. "It's his vernacular."
Shannon had only met the real Fowley once before filming began.
"We had dinner," Shannon said. "Me, Kristen and Joan met him for dinner one night at Denny's. The waiter, he took our drink orders and then got real nervous and he came back and spilled the entire tray of drinks all over the table."
Get more from Sundance in our scoop-filled Red Carpet blog.