Little Shop of Horrors is a remake of a 1960 movie of the same name.
Directed by Frank Oz, this one starred Rick Moranis as Seymour, Ellen Green as Audrey and the voice of Levi Stubbs as the Man-Eating plant known as Audrey II.
Seymour is a geek who works for a flower shop and is in love with Audrey. One day he finds a mysterious plant which after a time begins to get bigger and bigger. Finally it starts talking and when it does all hell breaks loose! FEED ME Seymour!" shouts the plant and feed it Seymour does.
Just remember, if your dentist looks like Steve Martin... run like hell!