The new trailer for Walt Disney's Frozen starring Kristen Bell, Idina Menzel, Jonathan Groff dropped today. So what's it all about? The official synopsis for the film reads as 'Fearless optimist Anna (voice of Kristen Bell) sets off on an epic journey - teaming up with rugged mountain man Kristoff (voice of Jonathan Groff) and his loyal reindeer Sven - to find her sister Elsa (voice of Idina Menzel), whose icy powers have trapped the kingdom of Arendelle in eternal winter. Encountering Everest-like conditions, mystical trolls and a hilarious snowman named Olaf, Anna and Kristoff battle the elements in a race to save the kingdom'. You can check out the trailer below. Frozen hits our screens on the 6th December, just in time for Christmas.