All Clara (Mackenzie Foy) wants is a key – a one-of-a-kind key that will unlock a box that holds a priceless gift from her late mother.

A golden thread, presented to her at godfather Drosselmeyer's (Morgan Freeman) annual holiday party, leads her to the coveted key—which promptly disappears into a strange and mysterious parallel world.

It's there that Clara encounters a soldier named Phillip (Jayden Fowora-Knight), a gang of mice and the regents who preside over three realms: Land of Snowflakes, Land of Flowers and Land of Sweets.

Clara and Phillip must brave the ominous Fourth Realm, home to the tyrant Mother Ginger (Helen Mirren), to retrieve Clara's key and hopefully return harmony to the unstable world. Starring Keira Knightley as the Sugar Plum Fairy and featuring a special performance by Misty Copeland,

Disney's new feature film is directed by Lasse Hallstrom and inspired by E.T.A. Hoffmann's classic tale. Eugenio Derbez, Matthew Macfadyen, Miranda Hart, Omid Djalili and Richard E. Grant also star.