Peter Gadiot was 23 in 13Hrs when he played the character 'Stephen Moore'.
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 38, and has starred in 4 movies in total, 4 of those since 13Hrs was released.
In 13Hrs, I think Peter Gadiot looks: