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
The Little Shop of Horrors to happen the last week in December 1959. Interiors were shot with three cameras in wide, lingering master shots in single takes. Welles states that Corman "had two camera crews on the set—that's why the picture, from a cinematic standpoint, is really not very well done. The two camera crews were pointed in opposite directions so that we got both angles, and then other shots were 'picked up' to use in between, to make it flow. It was a pretty fixed set and it was done sort of like a sitcom is done today, so it wasn't very difficult." At