The hilariousChris Prattturns 39 today. Can you believe it? It's hard to believe he's a day over 30 with his hulking bod and fresh-faced smile. TheGuardians of the Galaxy (2014)star has never looked better than he does when he takes off his clothes. Just look at the birthday boy's muscles!

Happy Birthday, Chris Pratt!Happy Birthday, Chris Pratt!

He's been a devoted dad to his son ever since he and wife Anna Faris split up. He's also been busy starring in new blockbuster hits and superhero movies. His career has gone a long way since playing lovable goof Andy Dwyer on Parks and Recreation. Now he goes into space with Jennifer Lawrence!

Happy Birthday, Chris Pratt!

And showing his tight tush!

Happy Birthday, Chris Pratt!

Happy birthday, Chris! We hope you continue to be as handsome and lovable as you've always been as you approach the big 4-0.

Happy Birthday, Chris Pratt!