LOS ANGELES -- Things might get chilly on Anna's birthday in Frozen Fever, a short film that features the lovable Frozen characters, because Elsa is sick with a cold.
Elsa, Anna, Kristoff, Olaf and Sven will all appear in Frozen Fever, which debuts in theaters March 13 during showings of the live-action Cinderella movie.
Disney is giving fans a sneak peek in the trailer, above. It also includes a new song.
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