[DFG]

Natalie Wood’s singing voice was dubbed by Marni Nixon in West Side Story.

George Chakiris was the only one out of the main characters to not be dubbed.

[minnesota_bound]

She didn’t even lip sync that song very well. The voice did not match hers at all.

[twister881]

>>George Chakiris was the only one out of the main characters to not be dubbed.<<
.
I could be wrong, but I always thought Rita Moreno did her own singing in the 1961 version. She has/had a distinctive and powerful voice and is an EGOT* awardee. Of course, with the recent Spielberg remake in which she also appears, Moreno has crapped all over the earlier film that made her a star. She is an ingrate and a phony.
.
*EGOT = Emmy, Grammy, Oscar, and Tony