Dominic Cooper was 21 in From Hell when he played the character 'Constable #3'.
That was over 23 years ago in 2001.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 45, and has starred in 39 movies in total, 37 of those since From Hell was released.
In From Hell, I think Dominic Cooper looks: