- In the diner scene near the end, the restaurant patrons were supposed to deck the Tony Randall character, who would fake the blow and slide down "unconscious" in the booth seat. However, during filming the actor overestimated his hook and knocked Randall out for real. The shot wound up being so good that the actual take shown in the film was the one of this accidental punch.
- This movie would be the first of three to showcase the trio of Day, Hudson, and Randall all together. It was followed by _Lover Come Back in (1961)_ and Send Me No Flowers (1964), with all three actors portraying different roles in each.
- Julia Meade (Marie) did a commercial every Sunday night live on The Ed Sullivan Show in New York City. So every Saturday she flew back.
- Towards the end of the movie Rock Hudson picks up 'Doris Day' and carries her through the lobby and down the street. After many takes, Hudson's arms were hurting, so they created a sort of sling which held Day in a crate-like device and hooked over Hudson's shoulders to evenly distribute her weight.
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