The Lockheed Electra seen in this film is the same one that was flown by Amelia Earhart on her ill-fated around-the-world flight attempt the following year.
The film was written to cash in on the popularity of "runaway heiress" films like It Happened One Night (1934), in which Clark Gable also starred.
Barny Pells (Franchot Tone) swears by the "seventh son of the seventh son"; Tone also does so in Mutiny on the Bounty (1935).
When Mike and Sally enter Fountainebleau Palace, Mike mentions that they were going to spend the night with some pretty important ghosts, including Richelieu. Sally replies, "I'd rather enjoy meeting Richelieu. I want to see if he really looks like George Arliss." George Arliss had starred as the title character in Cardinal Richelieu (1935) the year before this movie was released.