Based on Norman Corwin's satirical radio play
My Client Curley,
Once Upon a Time is an engaging bit of whimsy, completely dominated by the personality of star
Cary Grant. It all begins when fly-by-night Broadway producer Jerry Flynn (Grant) learns of a trained caterpillar (!) that dances to the tune of "Yes, Sir, That's My Baby." In short order, Jerry has promoted Curly the Caterpillar to international stardom-and in the process he alienates both Pinky Thompson (
Ted Donaldson), the impressionable 9-year-old who owns Curley, and Pinky's attractive older sister Jeanne (
Janet Blair). Eventually, Flynn comes to his senses and regains his essential decency-though it's too late to continue capitalizing on Curley, who has turned into a non-dancing butterfly! Full of delightful contemporary references and "cameo appearances" by such celebrities as producer Walt Disney and radio commentator Gabriel Heatter (both played by uncredited impressionists),
Once Upon a Time proved an agreeable diversion for wartime audiences. ~ Hal Erickson, All Movie Guide