Most actors would do anything for a role. Just ask Christian Bale, who gained weight to play Dick Cheney in the biopic "Backseat." Or Jared Leto, who lost 30 pounds for "Dallas Buyers Club." But the actors on this list did just gain or lose weight. These actors who got ripped for movie roles trained like they'd never trained before in their cozy lives. And some of them became almost unrecognizable. Almost.