Georgina Haig, who has appeared on Fringe and in the film The Sapphires, will portray Elsa in Once Upon a Time's fourth season. Elsa's Frozen character is loosely based on Hans Christian Andersen's The Snow Queen, and EW reports that the Frozen arc on Once Upon a Time will begin after the end of the animated film's narrative.
Frozen characters Anna and Kristoff will also appear in the show. Anna will be played by newcomer Elizabeth Lail, while Kristoff will be played by Greek's Scott Michael Foster.
Check out the show's Frozen reveal from the Season 3 finale in the clip below. --Meghan DeMaria