In "The King and I," Deborah Kerr's songs were sung by Marni Nixon. ... She made a few small film appearances over her career, including one of the singing nuns in "The Sound of Music," and also starred on Broadway in Stephen Sondheim's "Follies and Maury Yeston's Nine."

Did Deborah Kerr actually sing in The King and I?

Soprano Marni Nixon, shown above in June 1988, was dubbed "The Ghostess with the Mostest" in Time magazine. ... The singer dubbed the voices for Deborah Kerr in The King and I, Natalie Wood in West Side Story and Audrey Hepburn in My Fair Lady — three of Hollywood's biggest movie musicals.

Who didn't actually sing in the greatest showman?

7. Rebecca Ferguson who plays opera singer Jenny Lind didn't actually sing in the movie! Her voice is dubbed with a real life opera singer!