Actor in 'Simon Birch'?

Question

Just today, I saw the movie Simon Birch
It's a great movie about a young boy with stunted growth.
And it got me wondering, does anyone know if the actor who played the title character actually has a health condition, or if they were just a very young, but mature actor

Answer 1

http://imdb.com/name/nm0808508/
Ian has Morquio Syndrome, also known as MPSIVA. It affects the skeletal structure causing dwarfism. His full height is three feet, 1 inch tall.