Beau Bridges was 5 in No Minor Vices when he played the character 'Bertram (uncredited)'.
That was over 75 years ago in 1948.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 81, and has starred in 142 movies in total, 143 of those since No Minor Vices was released.
In No Minor Vices, I think Beau Bridges looks: