Boyd Holbrook was 26 in Milk when he played the character 'Denton Smith'.
That was over 14 years ago in 2008.
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 33 movies in total, 31 of those since Milk was released.
In Milk, I think Boyd Holbrook looks: