Frances Conroy, Alexandra Breckenridge Added to Ryan Murphy's FX Pilot

Frances Conroy and Alexandra Breckenridge have joined the cast of Ryan Murphy and Brad Falchuk’s FX pilot American Horror Story.

The actresses will both play Moira O'Hara, a housekeeper who has worked at the haunted home at the center of the drama for years.

The thriller centers on husband and wife Ben (The Practice's Dylan McDermott) and Vivien Harmon (Friday Night Lights' Connie Britton) who move their family from Boston to a haunted San Francisco home in an attempt to rebuild their family after a miscarriage and affair.

The housekeeper will appear as a woman in her 60s (Conroy) to Vivien, while a younger version (Breckenridge) will appear to Ben.

Conroy (Six Feet Under) and Breckenridge (Life Unexpected) join Jessica Lange as the Harmons' nosy neighbor; Denis O’Hare, who plays former Larry the Burn Guy, a former resident of the home; and Evan Peters as Tate Langdon, a charasmatic teen who who befriends Violet, Ben and Vivien's smart gothic daughter, who will be played by Taissa Farmiga.

Murphy (Glee) will direct the pilot, from 20th Century Fox, which is set to begin filming now that production on the Fox musical dramedy has wrapped.

Conroy, repped by ICM, had Bad Mom, a comedy pilot that did not move forward, at ABC.

Breckenridge, with the Kohner Agency, had the CW's drama pilot Cooper and Stone, which did not earn a series pickup.