The Hobbit: An Unexpected Journey is a 2012 epic high fantasy adventure film directed by Peter Jackson from a screenplay by Fran Walsh, Philippa Boyens, Jackson, and Guillermo del Toro. It is based on the 1937 novel The Hobbit by J. R. R. Tolkien. The Hobbit trilogy is the first instalment in acting as a prequel to Jackson's The Lord of the Rings trilogy.

The story is set in Middle-earth sixty years before the main events of The Lord of the Rings and portions of the film are adapted from the appendices to Tolkien's The Return of the King. An Unexpected Journey tells the tale of Bilbo Baggins (Martin Freeman), who is convinced by the wizard Gandalf (Ian McKellen) to accompany thirteen Dwarves, led by Thorin Oakenshield (Richard Armitage), on a quest to reclaim the Lonely Mountain from the dragon Smaug. The ensemble cast also includes Ken Stott, Cate Blanchett, Ian Holm, Christopher Lee, Hugo Weaving, James Nesbitt, Elijah Wood, and Andy Serkis. It features Sylvester McCoy, Barry Humphries, and Manu Bennett.

An Unexpected Journey premiered in Wellington on 28 November 2012, then released on 12 December in New Zealand and on 14 December in the United States, by Warner Bros. Pictures. It was almost nine years after the release of The Lord of the Rings: The Return of the King. The film received mixed reviews from critics and grossed $1.017 billion at the box office, making it the fourth highest-grossing film of 2012. The film received numerous accolades; at the 85th Academy Awards, it was nominated for Best Production Design, Best Makeup and Hairstyling, and Best Visual Effects.

Two sequels, The Desolation of Smaug and The Battle of the Five Armies followed in 2013 and 2014, respectively.