The Singing Nun (1966)

Synopsis
Henry Koster directed this cloying family musical based on the true life story of Soeur Sourire, a Belgian nun whose recordings made her an overnight sensation on The Ed Sullivan Show. Debbie Reynolds stars as Sister Ann, a Belgian nun who likes to compose little tunes on her guitar. She writes the song "Dominique" for a lonely little boy, Dominic Arlien (Ricky Cordell), whose mother has died and whose father is an alcoholic. Father Clementi (Ricardo Montalban) tries to promote the song, getting help from his old friend Robert Gerarde (Chad Everett), a record producer. "Dominique" becomes an international hit, thanks to Robert's efforts, and Ed Sullivan appears on the scene to film Sister Ann for his television program. Unsure of how to handle her amazing success, Sister Ann seeks out Father Clementi for advice, unsure of whether to give up her singing and remain a nun or to continue on with her singing career and renounce her vows. ~ Paul Brenner, All Movie Guide