That was over 9 years ago in 2011.
Today he is 37, and has starred in 48 movies in total, 20 since The Sitter was released.
In The Sitter, I think Jonah Hill looks:
The Sitter scores 5.4 out of 10 on The Movie Database.
Jonah Hill's first acting role was as 'Bret Hooten' in I Heart Huckabees, released in 2004 when he was 20.