Norm Macdonald was 34 in Billy Madison when he played the character 'Frank'.
That was over 29 years ago in 1995.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 2021 he died aged 61, starring in 43 films in his career, 43 of those after Billy Madison was first released. If he were alive today he would be 64.
In Billy Madison, I think Norm Macdonald looks: