Will Poulter was 12 in Son of Rambow when he played the character 'Lee Carter'.
That was over 17 years ago in 2007.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 30, and has starred in 20 movies in total, 19 of those since Son of Rambow was released.
In Son of Rambow, I think Will Poulter looks: