Louis C.K. was 24 in Ice Cream when he played an uncredited character.
That was over 31 years ago in 1993.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 56, and has starred in 45 movies in total, 44 of those since Ice Cream was released.
In Ice Cream, I think Louis C.K. looks: