Berlin-born Natasha Lytess, who appears in the small role as the Jewish hotel maid, was Marilyn Monroe's acting coach and friend for many years.
Director Leo McCarey shot additional scenes for insurance in September 1942, before Cary Grant and Ginger Rogers started new movies.
Released in the first year of the Second World War, this is one of the first Hollywood films to actually mention the word "Jewish" and to deal with the refugee problem.
The question of top billing was resolved by having half of the prints with Cary Grant listed first, and the other half with Ginger Rogers listed first. The TCM print lists Grant first, but the programs distributed for the world premiere at the Radio City Music Hall in New York City listed Rogers first.
Towards the beginning of the film, Cary Grant tells Ginger Rogers that he will always remember her character "just the way you look tonight;" evoking a smirk from Rogers. The line alludes to the song of the same title Fred Astaire sung to Rogers in Swing Time.