Actors Who Went Through Extreme Body Transformation For a Role

 Daniel Radcliffe, Jungle

The 28-year-old actor played real-life Israeli adventurer Yossi Ghinsberg, who was left stranded in an uncharted part of the Bolivian Amazon jungle for three weeks in 1981. He foraged for fruit and eggs from nests to survive, losing 35lbs as hunger, infection and disease took its toll.