Invisible Movie Hint

This week's Invisible Movie from 2001 was the first in a series of wildly popular films based on a series of wildly popular books. Five movies have been released with three more on tap through 2011. Incidentally, in this first film, he was just 11 years old. How's that for a clue?

Simply identify the movie and turn it in with your first answer at Trivia for five bonus points.