- Danny Kaye was a last-minute replacement for the originally-cast Donald O'Connor.
- The first film produced in Paramount's wide screen process "VistaVision".
- The TV camera in the Ed Harrison Show scene is a real one (a classic RCA monochrome; the cameraman is hiding the telltale logo with his hand), but the call sign atop it was real as well - it was that of Channel 4, NBC's (and thus RCA's) flagship station in New York, which changed its call sign to WRCA-TV the year of the film's release. (They adopted their current WNBC-TV calls in 1960.)
- The original idea was to reunite Fred Astaire and Bing Crosby, as they had been successful in Holiday Inn (1942). Astaire refused, as he had "retired" at the time, so the part was reworked for Donald O'Connor. O'Connor pulled out, and the part was reworked for Danny Kaye.
- The photo that Vera-Ellen shows to Bing Crosby and Danny Kaye of her brother, Bennie, is actually a photo of Carl 'Alfalfa' Switzer.
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