Jason Biggs was 11 in Mike Mulligan and His Steam Shovel when he played the character 'The Little Boy (voice)'.
That was over 34 years ago in 1990.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 45, and has starred in 39 movies in total, 38 of those since Mike Mulligan and His Steam Shovel was released.
In Mike Mulligan and His Steam Shovel, I think Jason Biggs looks: