Adriana Caselotti was 17 in Naughty Marietta when she played the character 'Dancing Doll (uncredited)'.
That was over 89 years ago in 1935.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 1997 she died aged 80, starring in 10 films in her career, 11 of those after Naughty Marietta was first released. If she were alive today she would be 108.
In Naughty Marietta, I think Adriana Caselotti looks: