Duck Soup is a 1933 Marx Brothers political farce. "This means war!" It has the famous mirror scene that was imitated in I Love Lucy:
The laws of the Rufus T. Firefly administration in song:
The last segment of the war with Firefly's constant un-noted uniform changes is hysterical. The movie is #85 on the 1998 edition of the AFI top 100 films list. On the 2007 update of the list it has moved up to #60.
Senses of Cinema has a page on this film which begins, "Duck Soup is indisputably the Marx Brothers' greatest film." Empire Online closes with this: "The Marx brothers on top form with their quickfire comedy and banter."
Roger Ebert considers it a Great Movie saying, "The Marx Brothers created a body of work in which individual films are like slices from the whole, but "Duck Soup" (1933) is probably the best." Rotten Tomatoes has a critics score of 94%.