10 Actors Who Physically Transformed Themselves For 2015 Movies

5. Jake Gyllenhaal - Southpaw

Will you get a load of Jake Gyllenhaal in upcoming boxing movie Southpaw? Is this the same gangly, wiry, super in need of a good night's sleep guy that audiences just glimpsed in the likes of Nightcrawler? Ya'll kidding? That's one hell of a transformation - one that Gyllenhaal has admitted might have cost him his relationship with model Alyssa Miller, given the way in which the process of bulking up began to take over his life. "The movie was full-on commitment," the Donnie Darko actor said on the matter. "We shot the fights in the first two weeks of the movie, so I trained for basically five months up to those fights." The upcoming boxing movie, directed by Antoine Fuqua (Training Day) and co-starring talents such as Forest Whitaker and Rachel McAdams, was originally envisioned as a vehicle for Eminem, but the part was later offered to Gyllenhaal. It's hard to imagine Eminem bulking up quite as much.