Top 50 funniest movies of all time
15. Duck Soup (1933)
Memorable quote: "I got a good mind to join a club and beat you over the head with it."
Laugh factor: This musical comedy from the four Marx brothers (Groucho, Harpo, Chico, and Zeppo) is now considered their best work, even if it wasn't properly appreciated at the time. Its most famous scene -- in which one character pretends to be the other's reflection in the mirror -- is a cultural touchstone that has inspired endless parodies.