Daniel Radcliffe
Radcliffe has changed his appearance numerous times throughout his career. When you think about it, the guy who locked himself into being Harry Potter extremely early in his career kind of needs to differentiate his appearance massively to avoid being typecasted. But, Radcliffe took this idea to the extreme when he starred in Jungle.
Man in the Woods
Jungle is about a young man who gets stranded in the Bolivian jungle for three weeks. Radcliffe plays Yossi Ghinsberg, the young man that this actually happened to. Radcliffe dropped 35 pounds by eating one chicken breast and one protein bar a day. This is a diet that he does NOT recommend anyone tries.