B. J. Novak was 26 in Unaccompanied Minors when he played the character 'Desk Attendant'.
That was over 16 years ago in 2006.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 43, and has starred in 15 movies in total, 14 of those since Unaccompanied Minors was released.
In Unaccompanied Minors, I think B. J. Novak looks: