Marni Nixon, the American cinema’s most unsung singer, died on Sunday in New York. She was 86. The cause was breast cancer, said Randy Banner, a student and friend. Classically trained, Ms. Nixon was throughout the 1950s and ’60s the unseen — and usually uncredited — singing voice of the stars in a spate of celebrated Hollywood films. She dubbed Deborah Kerr in “The King and I,” Natalie Wood in “West Side Story” and Audrey Hepburn in “My Fair Lady,” among many others. Starting as a teenager in the late 1940s and continuing for the next two decades, Ms. Nixon...
