Stephen Colbert loves Lord of the Rings... a lot. So much so that he even speaks freaking Elvish. He has an upcoming cameo in The Hobbit: Desolation of Smaug (the sequel to The Hobbit: An Unexpected Journey) that he hasn't even seen yet but really wants to.
All week the cast of The Hobbit have attested to Colbert's vast knowledge of everything Tolkien -- he even beat LOTR/Hobbit screenwriter Philippa Boyens in a trivia quiz when he visited the New Zealand set. Peter Jackson closed out Hobbit Week on the Colbert Report, in this hilarious interview Colbert begs to see Jackson's recently finished first cut for The Hobbit: Desolation of Smaug. He also proves once again that he is the king of geeks by answering, in great detail, a Hobbit question that Jackson has been wondering about for years.
He's already got Captain America's shield hanging up, and has brandished a couple of LOTR weapons that he's got his hands on. Even though Hobbit Week is over on the Colbert Report, I'm sure he'd be happy to leave his Middle Earth themed set the way it is.