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Peter Jackson's Hobbit trailer released

21 December 2011 Last updated at 11:36 GMT

A trailer for Peter Jackson's The Hobbit: An Unexpected Journey has been released, more than a year before the film opens in cinemas.

Bilbo Baggins will be played by Martin Freeman and Sir Ian McKellen and Elijah Wood reprise their roles as Gandalf the Grey and Frodo respectively.

Trailer courtesy Warner Bros