Among the many letters that Ginger Rogers received for her work in the film, this was the one that she treasured the most: "Hello Cutie - Saw "Kitty" last night and must write this note to say "That's it!" Yes, yes, a thousand times yes! You were superb Ginge - it was such a solid performance - the kind one seldom sees on stage or screen and it should bring you the highest honors anyone can win!! Hope to see you soon, As ever your, Fred."
Ginger Rogers was initially reluctant to take on the lead role, as the novel the film was based on contained explicit sexuality and Kitty has an abortion in it. Rogers' mother advised her to wait until she sees a screenplay before making up her mind, pointing out that the production code wouldn't allow most of the material Rogers found objectionable to be seen in films anyway. Sure enough, the adapted screenplay was "clean" enough for Rogers.
Ginger Rogers wore a dress in the film which instantly became so popular that to this day, the style is known within the garment trade as a Kitty Foyle dress. Characteristically, this would be a sleeved dress in black or navy with a white or ecru collar and cuffs.
Both Gladys Cooper and Cecil Cunningham, who play the mother and grandmother of Dennis Morgan's character, were in real life the same age. Both actresses were born in 1888, Cunningham in August and Cooper in December.
In the scene after Kitty has just had her baby, the first take was apparently a disaster. According to Ginger Rogers she couldn't stop laughing as the director started shaking the coins in his pockets before the scene. In the second take, a crew member told him to stop shaking the coins and she was able to do the scene without a glitch.