My Fair Lady - 1964 Film Soundtrack

Why is Julie Andrews listed as a performer on this recording. She did the broadway and Lonodon cast og MFL. But Certainly not the movie version that was Marni Nixon as listed.

I tried to track done my source, but for the time being: Marnie Nixon was never listed as the singer for years: The studio bosses tryed to push Julie Andrews as the leading actress and didn't want anyone to know that it was not her singing. Even on the first CD release Marnie Nixon was not yet mentioned. Watch the credits in the movie, Marnie Nixons name doesn't show up there....