Dakota Fanning says its a good thing she’s become such a close friend with co-star Kristen Stewart, as the two have to share a steamy on-screen kiss in their upcoming project The Runaways, about Joan Jett’s former band.

“We were so into the scene and into the script and the characters,” the 15-year-old tells Access Hollywood. “We’re playing Joan Jett and Cherie Curie and they’re best friends in the film and we became really close in real life.”