Lucas Hedges was 9 in Dan in Real Life when he played the character 'Lilly's Dance Partner'.
That was over 16 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 27, and has starred in 22 movies in total, 20 of those since Dan in Real Life was released.
In Dan in Real Life, I think Lucas Hedges looks: