That was over 13 years ago in 2007.
Today he is 37, and has starred in 68 movies in total, 56 since Knocked Up was released.
In Knocked Up, I think Seth Rogen looks:
Knocked Up scores 6.1 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.
Find DVDs, posters and memorabilia about Knocked Up on Amazon.