Marni NixonIlene WoodsMaria Callas
Margaret Nixon McEathron, known professionally as Marni Nixon, was an American soprano and ghost singer for featured actresses in movie musicals. (Wikipedia) When she was chosen to sing the lead role in the film "The King and I," she was given $420 and instructed not to tell anyone that Anna Leonowens wasn't the one singing.
Jason WeaverEvan SaucedoJohn Legend
Jason Michael Weaver, also known by his stage name J-Weav, is an American actor and singer whose well known for his role as Marcus Henderson on The WB sitcom Smart Guy, but barely known at all for his outstanding job as the singing voice of Young Simba in The Lion King. (NOTE: If you guessed Evan Saucedo, you were really close! Saucedo sang as Young Simba eight years later for a bonus song in the film when Weaver was too old to reprise his role.)
Davy JonesJohn TravoltaChristopher Reeves
That's right, the man who played old Clark Kent dubbed Young Clark Kent. This decision is no doubt confusing and it was especially mind-boggling to Jeff East who didn't know that none of his lines were going to be spoken by him.
Marni NixonOlga Viriapaeff (Natalie's sister)Natalie Wood wasn't dubbed
That's right, Nixon didn't just dub Hepburn and Leonowens, she dubbed Natalie Wood in West Side Story as well. Similar to the other films she "ghost sang" in, she was told to not tell anyone she was the voice of Maria, Deborah Kerr and Eliza Doolittle.