Actors Who Went Through Extreme Transformations For Roles

Jake Gyllenhaal, Southpaw

Gyllenhaal worked up 15 pounds of muscle to play a middleweight boxer in 2015’s Southpaw. He accomplished this by working out for six hours a day over six months.

Even though director Antoine Fuqua praised his dedication to the role, it’s not something the star is willing to do again. According to the star, it cost him his relationship with Alyssa Miller and was a ‘sacrifice’ to his body.