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The working title of the film was The Professor and the Coed. April through August 1952 Hollywood Reporter news items reported that Republic was planning an as yet untitled college musical, to be produced and directed by John H. Auer and shot at the University of Denver campus, starring Vaughn Monroe. According to an August 1952 Hollywood Reporter news item, Larry Kimball was signed to write the screenplay for Auer. However, Kimball's contribution to Geraldine, if any, has not been determined.
In a January 1953 Hollywood Reporter news item, Republic announced plans to star Monroe in The Professor and the Coed. In June 1953, according to a Los Angeles Times news item, John Carroll replaced Monroe, who was on tour, and Sidney Picker and R. G. Springsteen were set as the producer-director team. As noted in reviews, comic actor Stan Freberg, in his portrayal of "Billy Weber," did a take-off of popular singer Johnnie Ray. Geraldine was only the second onscreen appearance for Freberg, who made several hit recordings of his own which parodied other successful singers of the day. He was also the voice of several Warner Bros. and Walt Disney cartoon characters.