The last line of the stage play had to be partly obliterated in the film version by the sound of a typewriter being accidentally struck because the censors --even of that day--wouldn't allow the phrase "son-of-a-bitch" to be used in a movie.
The journalists are all based on actual reporters who were Chicago colleagues of authors Ben Hecht and Charles MacArthur, with most working alongside them at the courthouse. The real names were only slightly changed: Hildy Johnson was based on the real-life reporter Hildebrand Johnson, Walter Burns was based on the editor Walter Howey, and Mac McCue was based on reporter Buddy McHugh.
Continuing a practice common to the silent era, the film was shot with three cameras at the same time. This created three different negatives. The best negative was used for the US version. The second best was used for the UK version. And the final negative was used for the general international version. Additionally, some scenes were re-shot with different dialogue for the international markets.
After the film fell into public domain, all the distributed prints were made from the lower quality international negative. The preferred US negative fell into obscurity. In 2016, the Academy of Motion Picture Arts and Sciences premiered a newly restored copy of the original US negative, which had not seen general distribution for several decades. The picture and sound quality of this restored print is far superior to most previously available versions of the film.
The 2016 restoration of the long unseen original US release version was restored by the Academy Film Archive and The Film Foundation.