Bradley Cooper Shows Off His Buff Bod On American Sniper Movie Set

Who wears short shorts? He wears short shorts!

Bradley Cooper was hard at working filming his upcoming movie American Sniper in Los Angeles today, and the actor has really packed on some pounds and muscle to get into his character Chris Kyle, who had 160 confirmed kills during his military career before his death in February 2013.

We almost thought the Oscar nominee was only wearing underwear as he stood and chatted with director Clint Eastwood, but upon closer inspection we realized he was just clad in a pair of serious butt huggers!

According to his co-star Eric Close, B-Coop is doing everything he can to ensure the authenticity of his performance for the sake of honoring the late soldier.

"[Bradley has] really been working hard. He looks great. He's really taken on this character. He really takes this story personally and wants to do an honorable job for Chris' memory and for his family," the star told E! Online in April.

Personally, we never need to see a man's upper thigh, but if we have to at least it's the Sexiest Man Alive!

And if that's not your thing, later in the afternoon the actor shot scenes covered in mud by the beach. Dirty hot, anyone?