Marni Nixon Biography (Wikipedia)
Margaret Nixon McEathron (February 22, 1930 – July 24, 2016), known professionally as Marni Nixon, was an American soprano and ghost singer for featured actresses in movie musicals. She is now recognized as the singing voice of leading actresses on the soundtracks of several musicals, including Deborah Kerr in The King and I, Natalie Wood in West Side Story, and Audrey Hepburn in My Fair Lady, although her role was concealed from audiences at the time of the films' release.
Besides her voice work in films, Nixon's career included roles of her own in film, television, opera and musicals on Broadway and elsewhere throughout the United States, performances in concerts with major symphony orchestras, and recordings.
Marni Nixon Tracks