Jake Gyllenhaal has gone full beast mode for his role in the upcoming film Southpaw. He’ll be playing the role of Junior Middleweight Champion Billy “The Great” Hope alongside Rachel McAdams.

Packing on more than 15 pounds of muscle, Jake said he trained in the boxing ring twice a day, seven days a week for six months. This is a big change for Gyllenhaal, considering he just dropped 30 pounds to play the role of sociopath “journalist” Lou Bloom in Nightcrawler. Deadline obtained this image of Jake, you can tell the two a days really paid off.

Jake’s trainer Antoine Fuqua told Deadline:

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,” he added. “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.

If you haven’t seen Nightcrawler yet, check out the trailer below: