Marni Nixon on Dubbing for Marilyn Monroe and Deborah Kerr
Marni Nixon was the singing voice behind Deborah Kerr's Anna in "The King and I," Natalie Woods Maria in "West Side Story" and Audrey Hepburn's Eliza in "My Fair Lady," yet she never received a screen credit.
Listen to the entire interview here.
http://www.wnyc.org/shows/lopate/episodes/2009/02/23/segments/124482