Juliette Lewis was 5 in Bronco Billy when she played the character 'Child Spectator'.
That was over 44 years ago in 1980.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 50, and has starred in 74 movies in total, 71 of those since Bronco Billy was released.
In Bronco Billy, I think Juliette Lewis looks: