Mary Willie Grace Moore (December 5, 1898 - January 26, 1947) was an American operatic soprano and actress. Born in Slabtown, Tennessee, she won fame as an opera, Broadway and Hollywood star, and was nominated for the Academy Award for Best Actress in 1935 for One Night of Love.

She was at one point chosen by Florenz Ziegfeld as one of the most beautiful women in the world.

Moore's life story was made into a movie, So This is Love, in 1953, starring Kathryn Grayson.

Grace Moore died in a plane crash in Copenhagen Airport on January 26, 1947. Among the victims was also Prince Gustav Adolf of Sweden, father of the present Swedish king, Carl XVI Gustaf.