- The film played continuously at a special theater in Lourdes dedicated to it exclusively.
- Using an actress to play "the lady" was controversial enough, and further controversy fulminated when Loretta Young was passed over in favour of sultry Linda Darnell. At that time, Darnell had an almost pornographic reputation. Franz Werfel, the author of the book on which the film was based, threatened to remove his name from the project. To make matters worse, Darnell was pregnant. Nothing would change Darryl F. Zanuck's mind, and Werfel was told that an unknown actress was chosen. Wearing a little more drapery than the simple dress and veil described by the historical Bernadette, Darnell played the role in bright light.
- Jennifer Jones had made other films before this, but only under her real name, Phyllis Isley. In an effort to make the public believe that she was "discovered" for this film, her screen credit reads "and introducing Jennifer Jones as Bernadette."
- The movie's original score was partly composed by famous composer Igor Stravinsky but was subsequently rejected in favor of Alfred Newman's score. The second movement of Stravinsky's Symphony in Three Movements evolved out of the original unused score.
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