Kristen Stewart is finally showing off her full Joan Jett hairdo for The Runaways! After a few days of hiding it underneath hoodies or in ponytails, Kristen Stewart debuted her dramatic new look as she arrived at the studio today. Across the country, Robert was keeping his familiar hair hidden too with his cute hats. Kristen looked every bit the rock star right down to her t-shirt, which she knotted up in her new trademark style. So what do you think of Kristen's new look — into it or missing Bella's Twilight locks already?
Lots more of Kristen showing off her new hair so