Frozen

In "Frozen," Anna (voice of Kristen Bell), a fearless optimist, teams up with extreme mountain man Kristoff and his sidekick reindeer Sven in an epic journey, encountering mystical trolls, a funny snowman named Olaf, Everest-like extremes and magic at every turn in a race to find Anna's sister Elsa (voice of Idina Menzel), the Snow Queen, and save their kingdom from eternal winter. (official distributor synopsis)