Marx Brothers made a guest appearance to introduce the "Tonight Show's" new host, Johnny Carson. Around 1960, the acclaimed director Billy Wilder considered writing and directing a new Marx Brothers film. Tentatively titled "A Day at the U.N.", it was to be a comedy of international intrigue set around the United Nations building in New York. Wilder had discussions with Groucho and Gummo, but the project was put on hold because of Harpo's ill-health and abandoned when Chico died in 1961. He was 74. Three years later, on September 28, 1964, Harpo died at the age of 75 of a heart attack
Zeppo Marx all four Marx Brothers equally — "When the "four" Marx brothers are on the screen, it's a riot" [emphasis added] — and went on to describe each of the brothers' unique style of comedy, and praised Zeppo as "the handsome but dogged straight man with the charisma of an enamel washstand." In her book "Hello, I Must be Going: Groucho & His Friends", Charlotte Chandler defended Zeppo as being "the Marx Brothers' interpreter in the worlds they invaded. He was neither totally a straight man nor totally a comedian, but combined elements of both, as did Margaret Dumont. Zeppo's importance