The Hasbro and Lionsgate film's cast already includes Uzo Aduba, Emily Blunt, Kristen Chenoweth, Taye Diggs, Michael Pena and Liev Schrieber.
Rita Hsiao (Toy Story 2, Mulan) and My Little Pony: Friendship is Magic writer Meghan McCarthy are writing the script for the project, which will be directed by Jayson Thiessen.
The film will be produced by Brian Goldner, Stephen Davis and Josh Feldman, for Hasbro’s Allspark Pictures. My Little Pony: The Movie is scheduled for release on October 6, 2017.
Hear Sia's 'Unstoppable' Turned Into Olympics Anthem Feat. Pusha T: Exclusive Premiere
Sia is best known for her music and collaborating on songs with top artists like David Guetta ("Titanium") and Flo Rida ("Wild Ones). She released her seventh studio album This is Acting in 2016. She performed a song on the soundtrack for recent animated hit Finding Dory.
This article was originally published on The Hollywood Reporter.