Little Shop Of Horrors, The (1960)

aka: The Passionate People Eater

Classic black comedy about young man in a flower store (Jonathan Haze) who develops a bloodthirsty plant and is forced to kill in order to feed it. Directed by Roger Corman, the film was the basis for the later hit stage musical. Also stars Jackie Joseph and Mel Welles. Also with Dick Miller, Meri Welles and a very young Jack Nicholson (who appears in a small role).