Martin Compston was 17 in Sweet Sixteen when he played the character 'Liam'.
That was over 22 years ago in 2002.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 40, and has starred in 32 movies in total, 31 of those since Sweet Sixteen was released.
In Sweet Sixteen, I think Martin Compston looks: