- A re-shot version of Something's Got to Give (1962), the film Marilyn Monroe was working on when she died.
- The movie that Ellen describes to Bianca while giving her a massage is My Favorite Wife, of which Move Over Darling is a remake.
- 'Day, Doris' proved what a trouper she truly was when James Garner accidentally broke her rib (during the massage scene, when he pulls her off of Polly Bergen). Garner wasn't even aware of what had happened until the next day, when he felt the bandage while putting his arms around her.
- The film's producers scheduled the scene with Doris Day riding through a car wash for the last day of shooting because they were concerned that the detergents used in the car wash might affect the star's complexion. When the scene went off without a hitch, they admitted their ploy to Day, then used the story in promotional materials for the film.
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