That was over 14 years ago in 2007.
Today he is 64, and has starred in 40 movies in total, 12 since The Simpsons Movie was released.
In The Simpsons Movie, I think Dan Castellaneta looks:
The Simpsons Movie scores 6.9 out of 10 on The Movie Database.
Dan Castellaneta's first acting role was as 'Brian' in Nothing in Common, released in 1986 when he was 28.