Jeremy Sumpter went from 5 feet tall to 5' 8" during filming. The window of the nursery had to be rebuilt 4 times because the actor kept hitting his head on it.
"Nana" was a Newfoundland, a breed particularly good with children, not a St. Bernard as used in the film. J.M. Barrie modeled Nana after his own dog, a Landseer Newfoundland. These dogs were very popular in Victorian England and were actually used to supervise children.
Following tradition (in both theatre and film), the actor portraying Captain Hook is the same actor portraying Mr. Darling (Wendy's father). In this case, it's Jason Isaacs.
Both Rachel Hurd-Wood and Jeremy Sumpter had to be hospitalized at different points in filming due to injury and exhaustion.
Jason Isaacs's favorite of his own films, as he said in a 2008 interview with The Guardian. In 2021, in an online interview with Griffin Schiller for FilmSpeak, Isaacs reiterated that it's still a brilliant film to him, as it the only real version of the story accurately centering on Wendy's first pangs of puberty. He also called P.J. Hogan a magnificent director, loved every day on the set, and had the highest praise for everyone in the craft department.