Monkey Business (1931 film) the film, and that Eddie Cantor contributed when he visited the set during shooting Typical for many Marx Brothers films, production censors demanded changes in some lines with sexual innuendo. "Monkey Business" was banned in some countries because censors feared it would encourage anarchic tendencies. This is the first Marx Brothers film not to feature Margaret Dumont: this time their female foil is comedian Thelma Todd, who would also star in the Marx Brothers' next film, "Horse Feathers". A few years later, in December 1935, Todd died in unexplained circumstances. A line of dialogue in "Monkey Business" seems to foreshadow
Marx Brothers and the Marx Brothers. Most of the comedians provided their own voices for their animated counterparts, except for Fields and Chico Marx (both had died), and Zeppo Marx (who had left show business in 1933). Voice actor Paul Frees filled in for all three (no voice was needed for Harpo). The Marx Brothers' segment was a reworking of a scene from their Broadway play "I'll Say She Is", a parody of Napoleon that Groucho considered among the brothers' funniest routines. The sketch featured animated representations, if not the voices, of all four brothers. Romeo Muller is credited as having written