Hugh says he trained for months to get in shape for this film. By the time shooting began, Hugh was mostly muscle and only 4 percent body fat!

How did he do it? "It was a crazy, crazy thing. I have a trainer, of course. We train hard," he says. "Then, we got together with a guy who's a natural body builder to give us the body builder diet."

To get ripped, Hugh says he woke up every morning at 3:45 a.m. to eat six egg whites and one piece of dry toast. Then, every three hours for the rest of the day, he ate small, protein-rich meals. "You have to eat before you train," he says. "Otherwise, that really intense training, after about 40 minutes you start to flag."