Justin Chatwin was 17 in Josie and the Pussycats when he played the character 'Teenage Fan'.
That was over 23 years ago in 2001.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 41, and has starred in 28 movies in total, 27 of those since Josie and the Pussycats was released.
In Josie and the Pussycats, I think Justin Chatwin looks: