The Dunwich Horror is a 1970 American supernatural horror film directed by Daniel Haller, and starring Sandra Dee, Dean Stockwell, and Ed Begley. A loose adaptation of the short story of the same name by H.P. Lovecraft, the film concerns a young female graduate student who is targeted by a man attempting to use her in an occult ritual taken from the Necronomicon. The screenplay was co-written by Curtis Hanson, while Roger Corman served as an executive producer on the film.

Sandra Dee was an American actress. Dee began her career as a child model, working first in commercials and then film in her teenage years. Best known for her portrayal of ingénues, Dee earned a Golden Globe Award as one of the year's most promising newcomers for her performance in Robert Wise's Until They Sail (1958). She became a teenage star for her performances in Imitation of Life and Gidget, which made her a household name.