Peter Capaldi was 23 in Living Apart Together when he played the character 'Joe'.
That was over 41 years ago in 1982.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 66, and has starred in 77 movies in total, 75 of those since Living Apart Together was released.
In Living Apart Together, I think Peter Capaldi looks: