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 the real Audrey. Seymour fetches his sickly, odd-looking, potted plant, but Mushnick is unimpressed. When it is suggested that Audrey Jr.'s uniqueness might attract people to see it, Mushnick gives Seymour one week to revive it. The usual kinds of plant food do not nourish the plant, but when Seymour accidentally pricks his finger he discovers that the plant craves blood. Fed on Seymour's blood, Audrey Jr. begins to grow and the shop's revenues increase due to the curious customers who are lured in to see the plant. The plant develops the ability to speak and demands that Seymour feed