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At a Hook quote-along in Austin, Texas in January 2016, James Madio revealed that his Lost Boy character didn't have a name when they began filming. He continually inquired Steven Spielberg about this until one day when he said to Madio "don't ask." During the food fight, one of the boys calls Don't Ask by name just before he is splattered in the face.
When the Bannings fly to the United Kingdom for Christmas, the Pan Am captain's announcement is voiced by Dustin Hoffman. This is a nod to the classic tradition of dual-role casting from the original Peter Pan play, wherein Captain Hook and Darling patriarch Mr. George Darling are played by the same actor.
According to the 2019 bio of Carrie Fisher by Sheila Weller, first assistant director Bruce Cohen reported that Fisher was mainly hired to polish Tinkerbell's lines, though she did other things, as well. One exchange of dialogue Cohen credits to Fisher are the lines when Tinkerbell says, "You know that place between sleep and awake? That place where you still remember dreaming? That's where I'll always love you" ... "That's where I'll be waiting."
Dame Maggie Smith, being only 56 years old at the time of filming, was aged by make-up to play 92-year-old Granny Wendy.
Robin Williams became best friends with director Steven Spielberg while making this movie. Reportedly, after Williams' death, Spielberg decided to watch this movie out of remembrance, but couldn't finish it because he couldn't stop crying for several hours.
Bob Hoskins (Smee) would alleviate stress on-set by singing various versions of the Lionel Richie hit "Hello" by including the lyrics "Hello? Is it Smee you're looking for?"
Jimmy Buffett: One of the pirates who attempts to steal Peter's shoes when he first arrives in Neverland.