Several characters from the super-popular Disney movie Frozen are heading to Once Upon a Time next season.

Two of the roles have just been cast. Scott Michael Foster (Greek) will play Kristoff and Elizabeth Lail will play Anna (who was voiced by Kristen Bell in the movie) in recurring roles. Elsa, who was introduced at the end of the season-three finale, hasn't been cast yet. The character is expected to debut in the first episode this fall.