The dive scenes of Jack were performed by a 10-yr old Olympic diver. The wide shots of Lily during the dive scenes were of the director's 6 yr-old daughter.

When Jack and his party are entering the swamp after first seeing the Great Tree you can catch two short glimpses of a small statue of Pazuzu. Pazuzu is the demon from the movie Exorcist. (timestamps 53:08 and 53:21).

Because Ridley Scott thought that David Bennent's German accent would be hard to understand for children, he had Alice Playten (who also did Blix) dub him.

In the scene where Meg appears, Richard Picardo had a hard time breathing in the latex costume and mask while underwater. When he/she pops up, look closely; Meg appears to be spitting water and gasping for breath.

Jerry Goldsmith was the original composer for this film, but his work was canned for a variety of reasons for the more commercially appealing music of Tangerine Dream.

This movie inspired and sparked the birth of the famous and popular Nintendo adventure game series 'Legend of Zelda'.

The unicorn voices were the sounds of humpback whales.

During the making of the film,the directors had real birds populate the forest set(one of the largest sets ever built for a movie). One day, it was suddenly destroyed by an accidental fire. (No one was hurt, and all the birds flew out safely). They had to rebuild the entire set and continue filming.