It's time to play a favorite game of Mr. Man's: guess those buns! As connoisseurs of celebrity ass, we love to think we can guess a celeb'sbooty from miles away. Let's put this superpower to the test, shall we? Whose heavenly buns are these?

Let's Play Guess Those Buns!

First hint: He grew up in Wisconsin and Virginia.

Let's Play Guess Those Buns!

Second hint: His first film was a 1994dramedy called There Goes My Baby

Let's Play Guess Those Buns!

Third hint: He was supposed to star in Signs, but dropped out when he was diagnosed with a brain tumor. Thank goodness it was benign!

Let's Play Guess Those Buns!

Do you know who it is?

Let's Play Guess Those Buns!It's Mark Ruffalo!

Let's Play Guess Those Buns!

The sexy Mark Ruffalo always makes a movie better. With his down-to-earth attitude, burly bod, and loads of black hair Mark is a dream-come-true. He has no problem going naked either! We've had the opportunity to ogle the king of cool in his undies, shirtless, in bed and totally nude. We feel like we can never get enough of the Ruff!

Let's Play Guess Those Buns!