Christian Bale
If there is one actor for whom body transformations are nothing new it is Christian Bale. This chameleon of an actor is well known for changing his body to suit his roles whether that means gaining or losing weight. These extreme changes have earned him both praise and condemnation from critics and audiences alike. Two of his most famous and drastic changes were the amazing amount of weight he lost to play in The Machinist and directly after that, he gained weight and got in shape to play Batman.