Context: On June 15, 2016, Zac Efron began negotiations to star in the film, and in July 2016, Michelle Williams was cast. The film was choreographed by Ashley Wallen.

Question: who did the choreography for the movie the greatest showman?
Steam of consciousness below:

user
The relevant information to answer the above question is: The film was choreographed by Ashley Wallen.
So, the answer is Ashley Wallen.
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