Doris Day proved what a trouper she truly was when James Garner accidentally cracked two of her ribs (during the massage scene, when he pulls her off of Polly Bergen). Garner wasn't even aware that Day was injured until the next day, when he felt the bandage while putting his arms around her.
Doris Day wrote in her 1975 autobiography that because of her cracked ribs, she was so mummified with tape and bandages under her costumes that it was difficult to breathe and painful to laugh.
A re-shot version of Something's Got to Give, the never completed film Marilyn Monroe was working on when she died.
The movie that Ellen (Doris Day) describes to Bianca (Polly Bergen) while giving her a massage is My Favorite Wife, of which this is a remake.
The 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.
The role played by Chuck Connors was originally intended for Randolph Scott, but Scott announced his retirement from acting before filming began.
This film became the sixth-biggest moneymaker of 1964.