Kevin Bacon was 19 in Animal House when he played the character 'Chip Diller'.
That was over 46 years ago in 1978.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 65, and has starred in 106 movies in total, 103 of those since Animal House was released.
In Animal House, I think Kevin Bacon looks: