Cassandra Gay Peterson[1] is an American actress best known for her portrayal of the horror hostess character Elvira, Mistress of the Dark. Peterson gained fame on Los Angeles television station KHJ-TV in her stage persona as Elvira, hosting Elvira’s Movie Macabre, a weekly B movie presentation. A member of the Los Angeles-based improvisational and sketch comedy troupe The Groundlings, Peterson based her Elvira persona in part on a “Valley girl”-type character she created while a member of the troupe.

https://en.wikipedia.org/wiki/Cassandra_Peterson