That was over 6 years ago in 2015.
Today he is 43, and has starred in 66 movies in total, 14 since Trainwreck was released.
In Trainwreck, I think Bill Hader looks:
Trainwreck scores 5.8 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.