That was over 20 years ago in 2001.
Today he is 39, and has starred in 68 movies in total, 63 since Donnie Darko was released.
In Donnie Darko, I think Seth Rogen looks:
Donnie Darko scores 7.8 out of 10 on The Movie Database.
Seth Rogen's first acting role was as 'Ricky Danforth' in Donnie Darko, released in 2001 when he was 19.