That was over 14 years ago in 2007.
Today he is 33, and has starred in 47 movies in total, 35 since Superbad was released.
In Superbad, I think Michael Cera looks:
Superbad scores 7 out of 10 on The Movie Database.
Michael Cera's first acting role was as 'Taylor' in Switching Goals, released in 1999 when he was 11.