Ron Jeremy was 23 in This Is America when he played the character 'Self (uncredited)'.
That was over 47 years ago in 1977.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 71, and has starred in 720 movies in total, 715 of those since This Is America was released.
In This Is America, I think Ron Jeremy looks: