Watch Martin Freeman in The Hobbit (VIDEO)

Martin Freeman’s adventure as Hobbit Bilbo Baggins can be seen for the first time in a trailer to the Lord Of The Rings prequel, released online by Warner Bros.

The Office star Martin, Sir Ian McKellen and Cate Blanchett are among those who can be seen in the long-awaited teaser trailer of Peter Jackson’s The Hobbit: An Unexpected Journey, released on iTunes.

The trailer opens with an old Bilbo, played by Ian Holm, writing a letter to his nephew Frodo – the hero of The Lord Of The Rings – about his adventurous past.

Martin then appears as the young Bilbo, being invited by Gandalf to leave the Shire on a quest.

Breathtaking views of New Zealand, doubling for Middle Earth are shown in the clips of what is to come, and at the end the eery voice of Gollum, played by Andy Serkis, can be heard muttering, “Baggines, what is a Bagginses? Precious.”

Jackson has split JRR Tolkien’s book into two films, The Hobbit: An Unexpected Journey and The Hobbit: There And Back Again.

Filming is still taking place, with Martin’s Sherlock co-star Benedict Cumberbatch starting to shoot his role as Smaug the dragon next year.