From Wikipedia, the free encyclopedia. Cassandra Peterson (born September 17, 1951) is an American actress best known for her on-screen horror hostess character Elvira, Mistress of the Dark. She gained fame on Los Angeles television station KHJ wearing a black, gothic, cleavage-enhancing gown as host of Movie Macabre, a weekly horror movie presentation. Her wickedly vampish appearance is offset by her comical character, quirky/quick-witted personality, and valley girl-type speech. Description above from the Wikipedia article Cassandra Peterson, licensed under CC-BY-SA, full list of contributors on Wikipedia.