Michael Imperioli was 21 in Alexa when he played the character 'Acid Head'.
That was over 35 years ago in 1989.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 58, and has starred in 70 movies in total, 68 of those since Alexa was released.
In Alexa, I think Michael Imperioli looks: