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The film's working title was The Wonder Boy. Some sources also referred to it as The Wonder Man. According to a December 1943 Hollywood Reporter news item, Don Hartman was originally slated to write and associate produce the film, but the onscreen credits only credit him as a co-writer. The film began shooting on July 12, 1944 with Karl Struss as director of photography, David Rose as musical director and Perry Ferguson as art director, but production was suspended from 19 July to August 7, 1944 after Danny Kaye injured his leg during a dance routine. When shooting resumed, Victor Milner took over photography duties along with William Snyder, Louis Forbes became musical director, and Ernst Fegt became art director.
Wonder Man, which was Vera-Ellen's first film and Danny Kaye's second, opened to excellent reviews. According to the Variety review, some of Kaye's material had been used before in his stage shows, but was reworked for the screen by his wife, Sylvia Fine. In June 1943, Kaye had submitted the musical number "Anatole of Paris" to the War Department for approval for viewing by men abroad, and at that time, a Hollywood Reporter news item reports, it was deemed unacceptable because it depicted a Parisienne in an unflattering light. Other Hollywood Reporter news items add Bobby Summers, Gene Collins, Bertha Belmore, Alice Wallace, Grant Mitchell, Helen Chapman, Allan Dodel, Arleen Whelan and Allen Jenkins to the cast, but their appearance in the final film has not been confirmed. The picture received Academy Award nominations in the Music (Scoring of a Musical Picture); Sound Recording; and Music (Song-"So in Love") categories. It won an Academy Award in the Special Effects (Photographic Effects, John Fulton, and Sound Effects, Arthur Johns) category.