Marx Brothers "The Cocoanuts" (1925–1926) and "Animal Crackers" (1928–1929). Playwright George S. Kaufman worked on the last two and helped sharpen the brothers' characterizations. Out of their distinctive costumes, the brothers looked alike, even down to their receding hairlines. Zeppo could pass for a younger Groucho, and played the role of his son in "Horse Feathers". A scene in "Duck Soup" finds Groucho, Harpo, and Chico all appearing in the famous greasepaint eyebrows, mustache, and round glasses while wearing nightcaps. The three are indistinguishable, enabling them to carry off the "mirror scene" perfectly. The stage names of the brothers (except Zeppo) were
Groucho Marx up his hands and replying, "Don't shoot me! I'm only the piano player!" was so amusing that Elton John reused it as the title of a 1973 album. An added Marx homage was that a poster for the Marx Brothers' movie "Go West" was included on the cover art. Two albums by British rock band Queen, "A Night at the Opera" (1975) and "A Day at the Races" (1976), are named after Marx Brothers films. In March 1977, Groucho invited Queen to visit him in his Los Angeles home; there they performed "'39" a cappella. A long-running ad campaign for