Lena Dunham has joined the cast of ?American Horror Story? for Season 7, creator Ryan Murphy announced on Twitter on Wednesday. The post read, ?Thrilled that my talented friend Lena Dunham is joining the AMERICAN HORROR STORY family. Always wanted to work together, and now we r!? No details about Dunham?s role were released, and much of the upcoming season continues to be shrouded in secrecy.