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
Chico Marx his fly until he was seventy." Chico's lifelong gambling addiction compelled him to continue in show business long after his brothers had retired in comfort from their Hollywood income, and in the early 1940s he found himself playing in the same small, cheap halls in which he had begun his career 30 years earlier. The Marx Brothers' penultimate film, "A Night in Casablanca" (1946), was made for Chico's benefit since he had filed for bankruptcy a few years prior. Because of his out-of-control gambling, the brothers finally took the money as he earned it and put him on an allowance,