According to Broadway.com, it has been revealed that a new animated short based on Disney's Frozen will premiere next spring.
The film, called Frozen Fever, will include a new original song by Frozen's composers Robert Lopez and Kristen Anderson-Lopez.
Variety report that Frozen Fever will take place on Anna’s birthday, as Elsa and Kristoff plan to throw her a perfect celebration. However, Elsa’s magical powers get in the way, putting more than just the party in jeopardy. It is suggested Olaf will also make an appearance.
Casting is yet to be confirmed.