Flea was 19 in The Outsiders when he played the character 'Soc (uncredited)'.
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 61, and has starred in 96 movies in total, 95 of those since The Outsiders was released.
In The Outsiders, I think Flea looks: