Kristen Stewart is getting down and dirty for her new film 'Snow White and the Huntsman.' On 'The Tonight Show' (Weeknights, 11:35PM ET on NBC) she admitted that she hauled off and clocked Chris Hemsworth for real in one scene. Neither used a stunt double, though Hemsworth might have wished he had.

"Girls, if you've ever wondered if it works, it works," Stewart said. "I mean it literally spun him right around." She proceeded to smack her fist into her hand multiple times trying to mimick the sound. But then she said, "I'm not proud, though."

Jay Leno called her on this lie immediately, though. "You were just bragging," he pointed out. "You were proud." And she is, even if she does feel bad. She can feel both at once!