Ben Barnes was 24 in Stardust when he played the character 'Young Dunstan Thorn'.
That was over 15 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 41, and has starred in 18 movies in total, 16 of those since Stardust was released.
In Stardust, I think Ben Barnes looks: