The movie that Ellen (Doris Day) describes to Bianca (Polly Bergen) while giving her a massage is My Favorite Wife (1940), of which this is a remake.
Doris Day wrote in her 1975 autobiography that because of her cracked ribs, she was so mummified with tape and bandages under her costumes it was difficult to breathe and painful to laugh.
In bonus feature on the DVD release, Polly Bergen admitted she had misgivings about playing "second banana" to Doris Day. Day was the most popular actress in the world at the time and Bergen expected her to behave like a diva. However, Bergen admitted to "falling in love" with Day, finding her to be extremely charming, funny and generous.
A re-shot version of Something's Got to Give (1962), the never completed film Marilyn Monroe was working on when she died. With Dean Martin in the James Garner role.
Doris Day proved what a trouper she truly was when James Garner accidentally cracked 2 of her ribs (during the massage scene, when he pulls her off 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.