Norman John Warren (born 25 June 1942) is an English film director best known for such 1970s horror films as Satan's Slave (1976), Prey (1977) and Terror (1978).
Warren is also known for sex comedies such as Outer Touch (also known as Outer Spaced and Spaced Out, 1979).Along with the films of Pete Walker, Warren's movies are sometimes dubbed "New Wave" British horror, on the basis that they upped the ante in terms of sexual explicitness and gore from that of the Hammer and Amicus productions that dominated the genre in UK cinema up to the early 1970s.