A Night at the Opera (film) DVD commentary. But this could not have occurred, because Sam Marx had died in 1933, during pre-production of "Duck Soup", two years before "A Night at the Opera" was released. The rumor arose because Frenchy had had such a cameo appearance in the Marx Brothers' earlier "Monkey Business". There is, however, a reference to the Marx Brothers' mother, Minnie Marx, during the stateroom scene, in which a woman asks, "Is my Aunt Minnie in here?" Part of the concept of casting the Marx Brothers as stowaways on a ship was recycled from "Monkey Business". As Groucho's and Margaret Dumont's characters
The Threepenny Opera (1931 film) used in the film. Songs that were used include "The Ballad of Mackie Messer", "Love Duet", "Barbara Song", "Is It a Lot I'm Asking?", "The Ballad of the Ship with Fifty Cannons", "The Cannon Song", and "Song of the Insufficiency of Human Endeavor". "The Threepenny Opera" was the first film presented at Warner Brothers' new foreign-language theater in New York City. The versions of the film released in the United States and the United Kingdom were shorter than the 110 minutes of the original German version. The Threepenny Opera (1931 film) The Threepenny Opera () is a 1931 German musical