The Little Shop of Horrors

The 1960 version, starring Jack Nicholson. From Wikipedia:

The Little Shop of Horrors is a 1960 American horror comedy film directed by Roger Corman. Written by Charles B. Griffith, the film is a farce about an inadequate florist's assistant who cultivates a plant that feeds on human blood. The film's concept is thought to be based on "Green Thoughts," a 1932 story by John Collier about a man-eating plant.^[6] Dennis McDougal suggests that Griffith may have been influenced by Arthur C. Clarke's 1956 sci-fi short story "The Reluctant Orchid"^[7] (which was in turn inspired by the 1905 H. G. Wells story "The Flowering of the Strange Orchid").

The film stars Jonathan Haze, Jackie Joseph, Mel Welles, and Dick Miller, who had all worked for Corman on previous films. Produced under the title The Passionate People Eater,^[8][9] the film employs an original style of humor, combining black comedy with farce^[10] and incorporating Jewish humor and elements of spoof.^[11] The Little Shop of Horrors was shot on a budget of $28,000 (about $240,000 in 2019),^[12] with interiors being shot in two days utilizing sets that had been left standing from A Bucket of Blood.^{[13][14][15][16]}