Rabe's chracters is a famous murderer who has checked into the series' titular hotel. Rabe herself is currently appearing on the ABC series The Whispers.
Rabe played Sister Mary Eunice in Asylum, who made an appearance in a flashback during Freak Show. In Murder House, Rabe played the ghost Nora Montgomery, and in Coven she played the hippie witch Misty Day.
Rabe joins a cast that also includes Lady Gaga, Matt Bomer, Sarah Paulson, Kathy Bates, Angela Bassett, Evan Peters, Finn Wittrock, Chloe Sevigny, Wes Bentley, and Cheyenne Jackson.
American Horror Story: Hotel will premiere in October on FX.