Mitchell previously helmed the upcoming animated film "Shrek Forever After."
"'Once Upon a Time' Cinderella, Snow White and Sleeping Beauty married their handsome princes -- the Charming brothers -- and planned to live happily ever after. But when the Charming brothers go missing, the sisters-in-law must set out to save their husbands and the fairy tale kingdom," MGM said about the movie in a release.
The studio did not say when production on the film is slated to begin or who might star in it.
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