I could have sung all night

Singer and actress Marni Nixon, the singing voice of Deborah Kerr, Audrey Hepburn, and Natalie Wood in the films "The King and I," "My Fair Lady," and "West Side Story," respectively, tells her life story, describing her beginnings in show business, her roles on Broadway, her work with classical composers, and her battles to receive credit and royalties for films she dubbed.