Emily Blunt had to learn to ride for three months prior to the shoot, but because she is allergic to horses, she had to take a daily dose of antihistamine tablets throughout the production.
In the quest for historical authenticity, the production sought the input of a women-led racial and social justice organization known as the "IllumiNative," and many native American Pawnee advisers were frequently consulted as fact-checkers throughout the shoot. As an executive producer, Emily Blunt has said that she was deeply honored when the show received a rare stamp of approval from this organization at the official series premiere.
Filming was done in parts of Spain where Italian director Sergio Leone filmed his "Spaghetti Westerns."
In the beginning of the show when the Indian woman draws her hand across her forehead, the subtitles say "You are one of them." In actuality, she is making the sign of a white man. Indians would make that sign that describes a white man wearing a hat - Indians did not wear hats.
The production marks Emily Blunt's first role as an executive producer, and first role in a western film which she described as, "Alice in a wild west wonderland."