Your work isn't just to learn and say the lines. Your work is to figure out what the chatter in your brain is, that's going on under the lines. It doesn't matter whether you're speaking or not speaking because your mind is working the way your character's mind would work.
I've always favored kids as a player. If I walked out of the locker room and there were 100 people there and 50 of them were kids, I'd sign the 50 kids before anything else.