David Paymer was 23 in The In-Laws when he played the character 'Cabbie'.
That was over 45 years ago in 1979.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 69, and has starred in 83 movies in total, 82 of those since The In-Laws was released.
In The In-Laws, I think David Paymer looks: