[Kransha]

Too many dwarves to cast...ooh.

Bilbo: Ian Holm really worked well as Bilbo, despite his age, and I can't really think of many other hobbity people who could play the part so aptly as he.

Smaug (voice): That's gonna be either Alan Rickman or Jeremy Irons (I would suggest Tim Curry, but he has an irripressible accent that a dragon couldn't really work with very well).

Gollum: Riddles in the Dark cameo by Andy Serkis, obviously.

Thranduil: Actually, Jason Isaacs does seem to fit that part at least slightly. He can be very diverse, not just extremely mean. Perhaps Ian McDarmiad, but he's probably too old.

Bard: Also hard, perhaps Dennis Quaid (no idea why, but he might fit into that part)

Dwarves: Now that's the ultimate question, ain't it? Who could play such a dwarf. I don't know about Thorin, but Robbie Coltrane could probably do a good dwarf if necessary.