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 when he was 74. Three years later, Harpo died on September 28, 1964, at the age of 75, following a heart attack one day after heart surgery.