Douglas Booth was 12 in Hunters of the Kahri when he played the character 'Sagar'.
That was over 17 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 31, and has starred in 20 movies in total, 18 of those since Hunters of the Kahri was released.
In Hunters of the Kahri, I think Douglas Booth looks: