Alain Chabat was 29 in TVN 595, la télévision des nuls when he played the character 'Self'.
That was over 35 years ago in 1988.
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 68 movies in total, 67 of those since TVN 595, la télévision des nuls was released.
In TVN 595, la télévision des nuls, I think Alain Chabat looks: