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Change of Habit is a 1969 American crime drama musical film directed by William A. Graham, and starring Elvis Presley and Mary Tyler Moore. Written by James Lee, S.S. Schweitzer, and Eric Bercovici, based on a story by John Joseph and Richard Morris, the film is about three Catholic nuns, preparing for their final vows, who are sent to a rough inner city neighborhood dressed as lay missionaries to work at a clinic run by a young doctor. Their lives become complicated by the realities they face in the inner city, and by the doctor who falls in love with one of the nuns.