FX is welcoming another member into its coven. Emma Roberts is joining the third-season cast of American Horror Story: Coven. Details on which character the actress will play are being kept under wraps other than the fact she's a party girl. While little is known about the witch-themed season three of American Horror Story , producers said at PaleyFest in March that the series would again search for haunted places in America. Co-creator Ryan Murphy previously told The Hollywood Reporter that next year would feature three characters playing real people, with co-star Kathy Bates being one of them. Roberts joins a growing cast in the anthology from Glee's Murphy and Brad Falchuk that also includes her boyfriend Evan Peters , who will be back for his third run. Previously announced co-stars for season three include Angela Bassett, Patti LuPone, Gabourey Sidibe, Bates and returning players Jessica Lange, Peters, Sarah Paulson, Taissa Farmiga, Frances Conroy and Lily Rab