Here's how John Krasinski from 'The Office' got ripped in 4 months for his first action movie

Jason GuerrasioJan 15, 2016, 22:30 IST

Christian Black/Paramount

John Krasinski is known best for his comedic work, like lovable Jim Halpert on "The Office."

But starting Friday, we'll see him in a new way as he stars in his first action movie, Michael Bay's "13 Hours: The Secret Soldiers of Benghazi."

Krasinski told Men's Health he had just four months to train in preparation for the role of a Navy SEAL who defended the American diplomatic compound in Benghazi. After all, he had to look the part.

"I gotta be honest: It was brutal at times," Krasinski said. "We did tons of metabolic work, dragging sleds and all this stuff I've seen NFL players do.""My body fat was, I believe, 25%," Krasinski told Jimmy Kimmel on Kimmel's late-night show. "And then by the time I did the movie my body fat was 9%."Krasinski doesn't go out of his way to show off his new body in the movie, aside from one shirtless shot toward the end. But it was important to authentically play one of the six members of a security team that helped protect Americans in the 2012 terrorist attack in Libya that resulted in the death of Ambassador J. Christopher Stevens.Here are some highlights from Krasinski's experience getting fit for the movie, via Men's Health, including his favorite workout to do:

Favorite workout song: "What More Can I Say," Jay Z.

Favorite exercise: "Bench press. There's that number you can keep pushing. It's almost a game instead of a workout."

Least favorite workout: "Bulgarian split squat."

NOW WATCH: 3 hardcore exercises to build muscle superfast

Please enable Javascript to watch this video

Cookies on the Business Insider India website

Here's how John Krasinski from 'The Office' got ripped in 4 months for his first action movie

NOW WATCH: 3 hardcore exercises to build muscle superfast