Sometimes "getting into character" means a certain level of body modification. Whether it's slimming down, bulking up, or something more painful, Hollywood's finest will go the distance.
Don't write 50 Cent off as just a blowhard tough guy rapper. 50 fell deep into his character for 2011's Things Fall Apart. Playing the part of a football player diagnosed with cancer, Cent dropped a whopping 50 pounds with an all liquid diet and three-hour treadmill stints for nine weeks. The result was almost too extreme to be believed.