In a new interview with iFMagazine, the legendary actor Sir Ian McKellen has confirmed his involvement with The Lord of the Rings prequel, The Hobbit, indicating:

I have been promised I’m in it.

This happened 12 hours from eating dinner with The Hobbit director Guillermo Del Toro. He also mentioned that it’s possible that he will reprise [...]

Del Toro confirmed, in an interview with BBC Radio 5, that Hugo Weaving will reprise the role of Elrond in the upcoming Hobbit films. Also he confirms that Andy Serkis will reprise Gollum and Ian McKellen will reprise Gandalf.
Thanks EW!

Finally, speculations and debate about what would be the plot for the second Hobbit movie can stop, Petter Jackson and Guillermo del Toro talked to Empire magazine and revealed all.
“We’ve decided to have The Hobbit span the two movies, including the White Council and the comings and goings of Gandalf to Dol Guldur,” says Del [...]

Lord Of The Rings star Christopher Lee (Saruman)  has spoken to IGN about The Hobbit.
IGN: Will you be reprising your role as Saruman in The Hobbit or the follow-up film that links it to Lord of the Rings?
Lee: I’ve heard Ian McKellen has agreed to play Gandalf again in The Hobbit. But my character doesn’t [...]

Lord Of The Rings star Viggo Mortensen has spoken to totalfilm.com about The Hobbit, addressing speculation as to whether he’ll reprise his role as Aragorn.
“I’d rather finish the job myself than have another actor do it,” says Mortensen. “I’m interested in principle, but I’d want to see it done in the right spirit of Tolkien.”
Viggo [...]

Actor Dominic Monaghan, who played Meriadoc Brandybuck in the The Lord of the Rings films, spoke with MTV about the upcoming two Hobbit films while doing publicity for his new movie I Sell the Dead, which premiered today at the Sundance Film Festival. Interestingly, he talked about some possible cast returns to his hobbit role, since the creative team behind [...]