Whoa! Check Out Joseph Gordon-Levitt's Beefed-Up New Look

Joseph Gordon-Levitt at the Sundance Film Festival in January 2012 and filming "Don Jon's Addiction" on May 23, 2012. Credit: George Pimentel/Getty; JFXIMAGES.com

Let's hope he has a license for those things!

Joseph Gordon-Levitt showed off his new guns--er, biceps--on the set of his new film, Don Jon's Addiction, Wednesday.

The Dark Knight Rises actor, 31, donned a tight blue v-neck t-shirt, which highlighted his noticeably beefier build.

Though the star plays a cop in the upcoming Batman installment (starring Christian Bale and Anne Hathaway), Gordon-Levitt tells MTV News it was his role as a bike messenger in this summer's Premium Rush which really forced him into shape.

"I trained every day for a couple months leading up to this movie. I rode hard every day and all day," he revealed. "I definitely was riding a lot, riding through traffic, riding with cars, riding fast and doing scenes at the same time."

His main focus during those intense bike shoots?

Joked Gordon-Levitt, "Not dying!"