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Voice-over narration by Rosalind Russell by her character "Kim Halliday" provides comic inner dialogue throughout the film, particularly illuminating her techniques to charm "Elliot Atterbury" into a casino hotel partnership. Robert Alton's onscreen credit reads: "Choreographer and Associate Producer."
According to a December 15, 1953 Daily Variety news item, Leonard Gershe was scheduled to script the film, but he was later replaced by Robert Pirosh and Jerome Davis. By April 1954, New York Times reported that Russell's husband producer Frederick Brisson was considering Frank Loesser as musical director; however, he was replaced by songwriters Hugh Martin and Ralph Blane. The article also stated that Brisson was considering adding Imogene Coca, Frank Sinatra, Sheree North, Charles Coburn, Edmund Gwenn and Arthur Hunnicutt to the cast. A October 25, 1954 Hollywood Reporter article stated that the film had been in preparation initially at RKO, but Brisson later concluded a deal with Paramount instead.
Various 1954 and 1955 Hollywood Reporter news items add the following actors to the cast, although their appearance in the film has not been confirmed: Cass Jaeger, Manual Petroff, Jimmy Brooks, Joe Paz, Ray Weamer, Herb Lurie, Roy Damson, Meurisse DeRee, Edna Ryan, Durinda Clifton, Carmen Clifford, Pat Casey, Gretchen Hauser, Betty Hannon, Diane Gump, Barbara Drake, Sue Casey, Eve Gordon, Mary Ellen Gleason, Marion Ross, Lorraine Crawford, Peggy Creel, Bill Daniels, Joan Corbett and Hal Rand. In March 1955, Hollywood Reporter reported that choreographer Robert Alton was given credit as associate producer because of his work on the film's musical numbers. The Girl Rush marked actress Shelley Fabares' feature-film debut. According to a March 17, 1954 Variety article, Independent Artists' use of VistaVision in The Girl Rush was the first instance of a non-Paramount company using the technology. Portions of the film were shot on location at various sites in Las Vegas, NV, including the Flamingo Hotel, and in the nearby Valley of Fire. Although various news items suggested that The Girl Rush marked the film debut of Marion Lorne, she was first seen on film in the 1951 picture Strangers on a Train (see below).