The 65-year-old actress - who a different character in each of the first four seasons of the FX show - will not be returning for the fifth series of the US TV series, American Horror Story: Hotel, but paid tribute to creator Ryan Murphy and her co-stars for making it an "insane" experience.
Speaking at media convention PaleyFest in New York on Sunday, she told the audience: "Yes, I'm done. We've had a great run here. I have absolutely loved doing these four characters that I've had the opportunity to play.