Parks and Recreation star Chris Pratt (who’s married to Anna Faris), showed off his short-lived awesomely ripped shirtless bod when he sat down for a chat on Conan Monday.

The 33-year-old revealed that he hit the gym hard to be in convincingly good shape as a member of SEAL Team Six, the elite group of Navy counter-terrorism specialists famous for killing Osama bin Laden, in Oscar-buzzed Zero Dark Thirty, which hits theaters today. But he later had to pack on the pounds to play a schlub lawyer the upcoming comedy The Delivery Man.

“I’ve always been a little soft, I like to eat and I don’t like crunches. I had about five or six months and I really busted my ass to get in good shape,” he said to host Conan O’Brien, adding, “Almost immediately after I wrapped that movie, I gained 60 pounds to play a role in another movie. I’m kind of like a fatass [now]. I have a little extra belly going on.”

Watch the Conan clip after the jump!

Zero Dark Thirty trailer:

PR Photos, Conan