While Galadriel does not appear in the book The Hobbit, Cate Blanchett will reprise her role as Galadriel in the film. "Something moves in the shadows," she's seen saying in a trailer for the new film.
The leader of the dwarf group, Thorin Oakenshield is a strong and fearless fighter. He's played by Richard Armitage.
In The Hobbit, Bilbo Baggins (Martin Freeman) is swept into an epic quest to reclaim the lost Dwarf Kingdom of Erebor from the fearsome dragon Smaug. Approached out of the blue by the wizard Gandalf the Grey, Bilbo finds himself joining a company of 13 dwarves on a journey taking them through treacherous lands swarming with Goblins and Orcs, deadly Wargs and Sorcerers.