Actress Emma Roberts has landed a role in boyfriend Evan Peters' creepy U.S. drama series just weeks after learning her new TV pilot, based on sci-fi novel Delirium, was rejected by network executives. The Scream 4 star has signed up to join the cast of Ryan Murphy's American Horror Story: Coven, according to The Hollywood Reporter. She'll play a party girl in the third season of the acclaimed show. Peters has already been confirmed as a returning cast member and his previously announced co-stars for the new season include Angela Bassett, Gabourey Sidibe and Kathy Bates, while Jessica Lange, Sarah Paulson and Frances Conroy will also return. It is still not clear what will become of Roberts' small screen adaptation of Delirium, Lauren Oliver's novel about a teen in a dystopian future where love is outlawed. The show was initially approved by executives at the Fox network, but they decided to pass on the project after viewing the pilot episode. Taking to her Twitter.com blog on 9 May (13), Roberts shared her dismay with fans, writing, "Sad about Delirium. Thank you guys so much for your support!!!"