Christopher Eccleston was 26 in Let Him Have It when he played the character 'Derek Bentley'.
That was over 33 years ago in 1991.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 60, and has starred in 65 movies in total, 63 of those since Let Him Have It was released.
In Let Him Have It, I think Christopher Eccleston looks: