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Although contemporary news items note that the script was based on an unpublished story by B. Winkle (a pseudonym of Cary Grant's then-wife, actress Betsy Drake), onscreen credits and the SAB list Melville Shavelson and Jack Rose as the sole writers. In September 1956, an Los Angeles Times story reported that Rose and Shavelson had engaged Anna Perrott Rose to write the screenplay, but her contribution to the completed film has not been confirmed.
The same Los Angeles Times news story asserted that the movie would be filmed on Lake Union in Seattle, WA. Other news items announced that the story was to be set in the Midwest. According to Hollywood Reporter production charts, portions of the film were shot on location in Washington, D.C. Other portions of the film were shot on location in Virginia and California. According to a September 5, 1957 Hollywood Reporter news item, the two-deck houseboat set constructed at the studio was the largest set then in use at Paramount. Rose and Shavelson's screenplay was nominated for an Academy Award, as was the song "Almost in Your Arms."