Jake Gyllenhaal's t-shirt hugged his muscles as he carried his gym bag into a boxing studio in LA yesterday. He's bulking up for his role playing a cop in End of Watch, which is also the reason for his current hairdo. Jake Gyllenhaal shaved his head a few weeks back when he started filming and so far the look seems to be getting rave reviews from his many admirers. His stern face, aviators, and work boots make for a very serious Gyllenhaal, but he's known for the goofy sense of humor that makes him a charming full package. Jake is currently single and enjoying the good life between call times on set, heading to New Orleans for Jazz Fest and visiting family and friends in NYC.