The Truth About My Little Pony's Mane 6

All of the Mane Six have Canadian voice actors. Tara Strong, Ashleigh Ball, Andrea Libman, and Tabitha St. Germain originally hail from Canada, with both Strong and Libman coming from Toronto, while Ball and St. Germain hail from Vancouver (via IMDb).

Even the voice actors behind the ponies' singing voices have Canadian origins. Rebecca Shoichet, Kazumi Evans, and Shannon Chan-Kent, who sing for Twilight Sparkle, Rarity, and Pinkie Pie, respectively, were also born and raised in Canada (per IMDb).

The overwhelming majority of Canadian talent involved in the show can be best explained by its production location: Vancouver, Canada (via the Toronto Star). DHX Media is the Vancouver-based production company behind Hasbro's hit television series, and "My Little Pony: Friendship is Magic" producer Devon Cody told CBC News that nearly 70 different artists from DHX contribute to each episode and that just about every artist is Canadian-based. Cody saw the success of "Friendship is Magic" as a major stepping stone for the company and Canadian animation talent as a whole. "We have the chops here creatively to take a big brand with a lot of pressure, execute on that reputation and legacy, do it well and bring it to another level," he told CBC after the show concluded its nine-season run.