Have you marked March 13 on your calendar yet? That's when Disney's Cinderella [1] hits theaters, and it's also when you'll get to see Frozen Fever, the short follow-up to the smash hit. This time, Elsa is planning a big party for Anna's birthday, but things don't turn out like she plans. Enter Olaf covered in birthday cake. Take a look at more footage from the film [2], plus all the wondrous pictures [3], and watch the trailer below!

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