Geraldine Chaplin was 7 in Limelight when she played the character 'Little Girl in Opening Scene (uncredited)'.
That was over 72 years ago in 1952.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 79, and has starred in 142 movies in total, 138 of those since Limelight was released.
In Limelight, I think Geraldine Chaplin looks: