That was over 22 years ago in 1999.
Today he is 53, and has starred in 48 movies in total, 39 since The Iron Giant was released.
In The Iron Giant, I think Vin Diesel looks:
The Iron Giant scores 7.7 out of 10 on The Movie Database.
Vin Diesel's first acting role was as 'Himself' in Breakin' in the USA: Break Dancing and Electric Boogie Taught by the , released in 1984 when he was 16.