Jon Snow:
Patrick Fugit (the lead from "Almost Famous").
Okay, so he's 26, but we can Dawson Cast a little (he was cast as a teenager in 2002's "Saved!" and pulled it off pretty well). He does look young, he's a good actor, and he has just about the right amount of emo.
Big ups to
Roy Dotrice as Maester Aemon.
Am I totally nuts for thinking
David Schwimmer would work as Roose Bolton? Seriously. He's come a long way from Friends; watch
Duane Hopwood to get a good idea of his actual chops. The biggest problem is that he'd be a bit of a name star for someone with more screen time than lines, but he's always how I pictured Roose: brooding, intellectual, unassuming, all hiding the monstrosities he is capable of. I'd like that much more than over-the-top crazy.
I would also totally cast
Eric Balfour as Theon Greyjoy. He's got the right look and impressed me enough with his chops in his recurring role on "Six Feet Under" that I think he could pull off what Theon goes through.