Beau Knapp was 22 in Super 8 when he played the character 'Breen'.
That was over 11 years ago in 2011.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 34, and has starred in 34 movies in total, 30 of those since Super 8 was released.
In Super 8, I think Beau Knapp looks: