Adriana Caselotti was 22 in The Wizard of Oz when she played the character 'Juliet (voice) (uncredited)'.
That was over 84 years ago in 1939.
In 1997 she died aged 80, starring in 10 films in her career, 7 of those after The Wizard of Oz was first released. If she were alive today she would be 106.
In The Wizard of Oz, I think Adriana Caselotti looks: