Roger Allam was 34 in Ending Up when he played the character 'Dr. Mainwaring'.
That was over 35 years ago in 1989.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 70, and has starred in 39 movies in total, 37 of those since Ending Up was released.
In Ending Up, I think Roger Allam looks: