Efron covers his signature shag do with a knit hat while out in Burbank, Calif. Plus: Kristen Stewart, Johnny Depp, Gisele Bündchen and more

GRAY DAY

Zac Efron keeps his luscious locks under wraps while leaving a Burbank, Calif., studio on Tuesday. The heartthrob was filming an episode of the sketch comedy series Robot Chicken with actors Seth Green and Breckin Meyer.