Director Ryan Murphy previously tried to book Reese Witherspoon in a guest spot in season 3 of his horror anthology, American Horror Story. Whiterspoon has since been attached to this project.
Reese Witherspoon, Gwyneth Paltrow, and Cameron Diaz were all attached to the project at some point. They all have appeared in film musicals before: Witherspoon in Walk the Line, Paltrow in Country Strong, and Diaz in Annie, though the latter has since retired.