The Little Shop of Horrors recalled "at first they told me it was a detective movie; then, while I was flying back [to make the movie], I think they wrote a whole new movie, more in the horror genre. I think over a weekend they rewrote it." The screenplay was written under the title "The Passionate People Eater". Welles stated, "The reason that "The Little Shop of Horrors" worked is because it was a love project. It was "our" love project." The film was partially cast with stock actors that Corman had used in previous films. Writer Charles B. Griffith portrays several small roles. Griffith's
Little Shop of Horrors (film) much more convincing and lifelike. They realized they could film the puppet at a slower speed, making it appear to move faster when played back at normal speed. "By slowing it down it looked it was talking real fast. We then went 'holy cow, look at that. We can do it. The frame rate for filming the plant was slowed to 12 or 16 frames per second, depending on the scene, and frequent screen cuts were used to minimize the amount of screen time the puppet spent with human actors, and when interaction was totally necessary, the actors (usually Moranis)