Matthew Broderick was 20 in Max Dugan Returns when he played the character 'Michael McPhae'.
That was over 41 years ago in 1983.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 62, and has starred in 77 movies in total, 76 of those since Max Dugan Returns was released.
In Max Dugan Returns, I think Matthew Broderick looks: