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.

Mary Tyler Moore was an American actress, producer, and social advocate. She is best known for her roles on The Dick Van Dyke Show (1961–1966) and especially The Mary Tyler Moore Show (1970–1977), which "helped define a new vision of American womanhood" and "appealed to an audience facing the new trials of modern-day existence". Moore won seven Primetime Emmy Awards and three Golden Globe Awards. She was nominated for the Academy Award for Best Actress for her performance in Ordinary People. Moore had a supporting role in the musical film Thoroughly Modern Millie. Moore was an advocate for animal rights, vegetarianism and diabetes awareness and research.