He was in The Long Kiss Goodnight, about a dudette with lost memories.
He was Hannibal Lecter in Manhunter, a villain who teased a cop with memories he’d like to lose.
I like Martin Freeman very much and agree he could make an excellent Bilbo. If not him, I’d suggest James McAvoy, who was excellent in Atonement, Becoming Jane and The Lion, the Witch and the Wardrobe, and who also has the look of an estimable Hobbit, I think: James McAvoy - Wikipedia
I could easily see Brian Cox as a Dwarf - perhaps Thorin himself.
In addition to a cameo by Legolas in his father King Thranduil’s hall, I’d like to see a young (age 9 or 10, I think) Aragorn, then known as Estel, in Rivendell. Perhaps he and Bilbo could have a word or two in the library.
The Plain Dealer of Cleveland carried a wire-service story a few months ago that both Andy Serkis (Gollum) and Hugo Weaving (Elrond) had been confirmed as returning for The Hobbit. Guess not…?
True, I just like Bilbo better than Frodo. 
That was Brian Cox!? Wow I had no idea! I’ll listen again for him when it’s replayed on Saturday.
Wouldn’t I like to hear the voice of Hugh Laurie in this film!
But which part? Troll’s voice, or perhaps voice of Smaug.