He's the cute, talented, dark-haired guy that Jennifer Garner's 13 Going on 30 character was after in that romantic film. Mark Ruffalo is also catching the eye of Reese Witherspoon's character in the new romantic comedy Just Like Heaven. What is it about this guy that makes him the dude you wanna cuddle with? He's nice. Mark is friendly, funny and always has a smile on his face. That's a good thing since, a few years ago, the actor had to overcome a brain tumor!

Just Like Heaven Credit: Dreamworks

Ruffalo, although he has played bad guys or "rougher" roles (In the Cut, Collateral, Windtalkers) can easily segue between intense drama and light comedy. We caught up with him in L.A. last month and got the scoop on playing a guy who sees...spirits. After congratulating him on the new baby (his wife was pregnant while he was making "Heaven"), we got down to the important stuff like is he a neat freak or kind of a slob like his character in the film?

Mark: I'm probably in between.

TeenHollywood: So, you wouldn't leave a water mark from a glass on the coffee table?

Mark: Well, I might do that. But this guy is real bad. I sort of have to contain it [my mess] to my own closet. Otherwise, I will be thrown out of the house and I like living in my house.

TeenHollywood: You were great doing the physical comedy in this film. Have you done that before?