Kristen Stewart Channels Joan Jett

Hiding her new haircut behind a Nuns With Guns gray hoodie, Kristen Stewart sets down a guitar case as she gets ready to leave a studio in North Hollywood on Tuesday afternoon (June 9).

The 19-year-old actress and costar Dakota Fanning have been busy rehearsing for their upcoming flick, The Runaways.

The Runaways tells the story of the 1970s teenage rock band responsible for hits “Cherry Bomb,” “Queens of Noise” and “Born to Be Bad.” The flick will also star Stella Maeve as drummer Sandy West.

10+ pics inside of Runaways Kristen and Dakota…