Robert Donat made his only trip to Hollywood during the production of this film. Due mainly to his poor health, he was unable to travel to Hollywood again to film any of his other roles.
The ending is changed from Dumas's original novel to make it more upbeat. In the novel, Edmond does not marry Mercedes, because she feels too much has passed between them. Instead, he marries Princess Haydee, who has fallen in love with him. In the 1934 film (and in some other film versions), there is not even a hint of romantic interest between Edmond and Haydee.