Yesterday, Deadline released the first image from Jake Gyllenhaal's upcoming film Southpaw, in which he plays a championship prize fighter, and, uh, ahh, he looks different!

Here is Jake Gyllenhaal after losing 25 pounds to play nocturnal sociopath Lou Bloom in Nightcrawler, his most recently released film:

Here he is, via Deadline, after gaining 15 pounds of muscle for his role as Junior Middleweight Champion Billy "The Great" Hope in the upcoming Antoine Fuqua-directed Southpaw:

Deadline spoke with Fuqua about Gyllenhaal's transformation:

"I'm so pumped, man," Fuqua said. "Jake is going to change how people see him. I had him training twice a day in the boxing ring, he did two-a-days seven days a week. I pretty much had him with me and my trainer every day. I took him to almost every fight. I had him train at Floyd Mayweather's gym in Vegas and we watched Floyd's fights, and the Manny Pacquiao fight. He trained in New York at Church Gym with real fighters. We literally turned him into a beast… Jake, my god, he's a very electric, powerful fighter in this movie, and a guy who fights for his daughter. I'm confident that this will change how people see Jake, as a leading man.

Yup. He sure looks different!

[via Deadline]