MTV talked with Peter Jackson regarding The Hobbit casting, which starts this week, and now Jackson is revealing a few more Lord of the Rings stars in addition to the previously-announced Ian McKellen who will reprise their J.R.R. Tolkien characters:

Gandalf, being a 2,000-year-old wizard, is still around and plays a major role in 'The Hobbit,' and we're having Ian McKellen reprise," explained the filmmaker, who is executive-producing the flick and writing the screenplay. "There's a couple of other characters: Elrond, who was played by Hugo Weaving [in the original films], and there's a possibility of Galadriel, who was played by Cate Blanchett."

"In some respects, it's a prequel," Jackson said of the flick, which he plans to begin filming in mid-2010. "In book terms, the world of 'The Hobbit' takes place 60 years before 'The Lord of the Rings,' as it was written by Tolkien. So, not a lot of the characters actually feature, because they weren't around yet."

Production on the Guillermo del Toro-directed films is scheduled to start April or May. The first movie is targeted for a Dec. 2011 release followed a year later by the second in Dec. 2012.