That was over 14 years ago in 2007.
Today he is 43, and has starred in 66 movies in total, 57 since Hot Rod was released.
In Hot Rod, I think Bill Hader looks:
Hot Rod scores 6.3 out of 10 on The Movie Database.
Bill Hader's first acting role was as 'Eric' in The Pity Card, released in 2006 when he was 28.