What is the name of the 2020 short film about Olaf's origin?

The 2020 short film about Olaf’s origin is Once Upon a Snowman. It follows Olaf immediately after Elsa brings him to life during “Let It Go” in Frozen, before he meets Anna, Kristoff, and Sven.

The short explores questions the original film leaves mostly unanswered: why Olaf loves summer, how he chose his carrot nose, and how he came to understand his identity. He visits Wandering Oaken’s Trading Post, experiments with several possible noses, and briefly uses a sausage before giving it to a hungry wolf. A memory of Anna and Elsa playing together helps him realize who he is.

Produced by Walt Disney Animation Studios, the film was directed by Trent Correy and Dan Abraham. It was released exclusively on Disney+ on October 23, 2020, and runs for about eight minutes. It is commonly confused with Olaf’s Frozen Adventure, a 2017 holiday featurette, or Frozen Fever, a 2015 short focused on Anna’s birthday.