That was over 18 years ago in 2003.
Today he is 41, and has starred in 42 movies in total, 24 since Open Range was released.
In Open Range, I think Diego Luna looks:
Open Range scores 7 out of 10 on The Movie Database.
Diego Luna's first acting role was as 'Tenoch Iturbide' in Y Tu Mamá También, released in 2002 when he was 22.