Theo James was 24 in You Will Meet a Tall Dark Stranger when he played the character 'Ray'.
That was over 14 years ago in 2010.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 39, and has starred in 20 movies in total, 19 of those since You Will Meet a Tall Dark Stranger was released.
In You Will Meet a Tall Dark Stranger, I think Theo James looks: