Anthony Michael Hall was 10 in The Gold Bug when he played the character 'The Boy'.
That was over 43 years ago in 1980.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 54, and has starred in 63 movies in total, 63 of those since The Gold Bug was released.
In The Gold Bug, I think Anthony Michael Hall looks: