Ernst Lubitsch worked with Edwin Justus Mayer in the scripting process. Edwin Justus Mayer worked with Lubitsch before in To Be or Not to Be.
According to Book "Ernst Lubitsch and Samson Raphaelson: A Study in Collaboration," Ernst Lubitsch directed the rehearsals of this film.
First film of John Russell.
In the Alfred Hitchcock/William Everson interview, it is revealed that Ernst Lubitsch did the storyboards for this film and handed them over to Otto Preminger to carry out the orders for Lubitsch.
The script of this film was written and prepared under Ernst Lubitsch, and he was the original director of this film. But he became ill during shooting, so Lubitsch hired Otto Preminger to do the rest of the shooting.