Trivia

Ryan Murphy interviewed Bette Davis months before her death in 1989. The agreed-upon 20-minute interview lasted four hours, and inspired his characterization of Davis. When he asked her about Joan Crawford, she would talk about how much she hated her, before saying "She was a professional. And I admired that."

The series was in development - with Jessica Lange and Susan Sarandon on board - for seven years before finally being given the green light.

During the beginning credits of each episode, both Jessica Lange and Susan Sarandon's names switch based upon who's shown first each week - as if they are fighting for top billing, much like their respective characters in Feud (2017).

Catherine Zeta-Jones claimed that while she did not contact 100 year old Olivia de Havilland to advise on her portrayal, she did consult her (also 100 years old) father-in-law Kirk Douglas for advice. She claimed that Douglas described de Havilland as "Aaah Olivia," Bette Davis: "Aww, she was a broad. She told it as it was," and Joan Crawford: "She was out of her fucking mind!"

B-movie director William Castle is played by cult film director John Waters. The casting is a wish-fulfillment for Waters, who was heavily influenced by Castle. The production deliberately did nothing to make Waters resemble Castle so that any viewer who recognized him would get the joke. Waters also recorded a commentary track for the Joan Crawford bio-pic Mommie Dearest (1981). William Castle was well known for his gimmicks, to which Waters has said "when he finally said he wasn't going to gimmicks any more, he went out and got the biggest gimmick of all; Joan Crawford!" for the film Strait-Jacket (1964).