Trivia: Most of the secondary cast and extras were people who actually fled Europe to America during Nazi rule. When Laszlo orders the band to play "La Marseillaise," it was very emotional for the cast who sang along and their reactions were very much their true feelings at the time.
Trivia: Even though Greer Garson plays Richard Ney's mother in the movie, she was only 12 years older than him.
Trivia: When the wildlife of the forest celebrate the start of a new spring season at the start of the film, a bird feeds her three baby birds a small group of berries that resembles a "Hidden Mickey."
Trivia: During production, James Cagney broke a rib whilst filming a dance scene. In spite of the injury, he still managed to complete the sequence.
Trivia: In the movie, Lou Gehrig concludes his farewell speech with the famous line "I consider myself the luckiest man on the face of the earth". However, in real life, he continued after this point. The last lines of his speech were "And I might have been given a bad break, but I've got an awful lot to live for. Thank you."
Trivia: The Holiday Inn chain of motels, founded after World War II was named after this movie, not the other way around.
Trivia: This is the first film of nine that Spencer and Hepburn appeared together. They fell in love during the shooting of this film.