I learned how to turn it on and turn it off. You learn that in theater, too, but for film work, I learned from doing 'Henry,' I learned how to leave work at work and go home. There's always spillover. Actors speak of this.

I got my training here in Chicago at the Goodman School Of Drama, and a lot of my personal work is usually internal work and stuff. Everything else that goes on is icing on the cake - your wardrobe, your makeup, whatever else you have to do.

I was pretty confident that I'd be playing something, if James Gunn could convince Marvel Studios and Disney to cast me. He's involved with the casting too, but if he could convince them to go along with him and agree with getting me on the roster, then yeah, I would have voiced Groot. Not a problem. Groot is an awesome character.

I've always wanted to play a teacher.

Actors are actors. They're all buddies. I've done so many movies and TV that you get to be friends with everyone. And the ones you don't get to be friends with, you simply don't work together with them again.

Actors basically do their thing on the set, and then you put all the pieces together, switch them around, and maybe put them a different way that looks better. We just give him everything he needs, and then he goes in and does his thing.

You forget about it, after awhile. You forget that you even have it on. It becomes part of you. You get used to it, even the teeth and the contacts, which bothered the hell out of me. It ends up being something that is part of the role, and part of the thing that you're doing. After awhile, it just feels pretty damn awesome.