“Hasbro’s attempts to turn its toys into movies have yielded mixed results. For every Transformers, there’s a Battleship — or worse, aMonopoly, which still hasn’t managed to pass Go despite years of efforts. But there’s a lot riding on My Little Pony, based on one of the hottest properties in its stable. So Hasbro and Lionsgate have enlisted a big-name star to guide the film to success. Fans will get to see Emily Blunt in My Little Pony alongside Kristin Chenoweth. 

In addition to Blunt and Chenoweth, My Little Pony will feature the voice cast of My Little Pony: Friendship Is Magic: Tara Strong, Ashleigh Ball, Andrea Libman, Tabitha St. Germain, and Cathy Weseluck.

The story follows the “Mane 6” (i.e., Twilight Sparkle, Applejack, Rainbow Dash, Pinkie Pie, Fluttershy, and Rarity) as they face a new dark force threatening Ponyville. To save their home, they embark on an unforgettable journey beyond Equestria. Deadline reports Blunt and Chenoweth are both voicing new characters, and details on their characters have not been released…”

http://www.slashfilm.com/emily-blunt-in-my-little-pony/