Judd Nelson was 22 in Rock 'n' Roll Hotel when he played the character 'Johnny'.
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 64, and has starred in 103 movies in total, 100 of those since Rock 'n' Roll Hotel was released.
In Rock 'n' Roll Hotel, I think Judd Nelson looks: