10 Times Actors Completely Transformed Their Bodies For Roles

4. Jake Gyllenhaal – ‘Southpaw’ 

The skinny Jake we know from most of his movies turned into a beast for the movie Southpaw. His role as a boxer made him work six hours a day, seven days a week, for six months. The crazy regimen changed not only his body but his mind too. He learned to deal with pressure and gained a lot of self-confidence. Jake enjoyed the role so much that he never let his stunt double work. “He put his heart and soul in this movie,” said his trainer Terry Claybon.