Totally Unrecognizable: Top 10 Wild Celebrity Fitness Transformations

Jonah Hill, Before: Superbad And Pretty Big

Jonah rose to fame by playing funny fat guy roles in movies like Superbad. He didn’t stay big for long, though. He shed 40 pounds from his 250-pound frame in 2011; though he later gained weight for another movie role, he went back to a slimmer size after that, too.