who did Natalie wood's singing in west side story?

Answer 1

Marni Nixon (who dubbed for Natalie Wood) had to do the end of quintet for Rita Moreno. The reason was that Betty Wand and Moreno both had colds and could not sing, so the filmmakers asked Nixon to do the end. So she is singing two voices at once.

Answer 2

Marni Nixon

Answer 3

She did