Alexandra Breckenridge joins the cast of producer Ryan Murphy’s (“Nip/Tuck”) F/X pilot “American Horror Story.” The pretty 29-year-old will play the young ghost of Moira O’Hara, a woman once charged with the keep of the house in which troubled married couple Ben (Dylan McDermott) and Vivien Harmon (Connie Britton) are now living.

The pilot is written by Murphy and costars Jessica Lange as the Harmon’s nosy neighbor Constance, Dennis O’Hare as Larry the Burn Guy, Taissa Farmiga as the Harmon’s goth daughter Violet, Evan Peters as Violet’s friend Tate Langdon, and Frances Conroy as the old ghost of Moira O’Hara.

Breckenridge’s only horror creds to date are the 2002 indies Vampire Clan and Wishcraft. She is best known for her voice work on Seth MacFarlane’s “Family Guy” and for starring on The CW’s “Life Unexpected” and the short-lived F/X’s series “Dirt.”