The Bells of St. Mary's (1945) is an American musical comedy-drama film, produced and directed by Leo McCarey and starring Bing Crosby and Ingrid Bergman. Written by Dudley Nichols and based on a story by McCarey, the film is about a priest and a nun who, despite their good-natured rivalry, try to save their school from being shut down. The character Father O'Malley had been previously portrayed by Crosby in the 1944 film Going My Way, for which he won the Academy Award for Best Actor. The film was produced by Leo McCarey's production company, Rainbow Productions.

James Van Heusen was an American composer. He wrote songs for films, television and theater, and won an Emmy and four Academy Awards for Best Original Song.