The Spanish Fly (German: Die spanische Fliege) is a 1931 German comedy film directed by Georg Jacoby and starring Oscar Sabo, Betty Bird and Lizzi Waldmüller. It was shot at the Tempelhof Studios in Berlin. The film's sets were designed by the art director Hans Jacoby. It premiered at Berlin's Gloria-Palast. It was based on the 1913 play The Spanish Fly by Franz Arnold and Ernst Bach. The film was remade in West Germany in 1955.
The successful mustard manufacturer Ludwig Klinke had a brief fling with a exotic dancer known as "The Spanish Fly" and for twenty years has been secretly sending payments to support their illegitimate child without the knowledge of his strict wife Emma. When a young man Heinrich turns up, Ludwig panics and thinks it is his long-lost son. In fact Heinrich is there to ask him for his daughter Wally's hand in marriage. Ludwig finally gives his blessing, relieved after his frantic attempts to conceal him from his wife. He also discovers that several other industrialists also had affairs with The Spanish Fly and have each been paying her maintenance for a "son" for years.