Frozen is a 2013 American 3D computer-animated musical fantasy film produced by Walt Disney Animation Studios and released by Walt Disney Pictures. The 53rd Disney animated feature film, the film is inspired by Hans Christian Andersen's fairy tale "The Snow Queen". It tells the story of a fearless princess who sets off on a journey alongside a rugged iceman, his loyal reindeer, and a naïve snowman to find her estranged sister, whose icy powers have inadvertently trapped their kingdom in eternal winter. Frozen underwent several story treatments for years before being commissioned in 2011, with a screenplay written by Jennifer Lee, who also co-directed with Chris Buck. The film features the voices of Kristen Bell, Idina Menzel, Jonathan Groff, Josh Gad, and Santino Fontana. Christophe Beck, who had worked on Disney's award-winning short Paperman (2012), was hired to compose the film's orchestral score, while husband-and-wife songwriting team Robert Lopez and Kristen Anderson-Lopez wrote the songs.