Trivia: Stan Lee (Stanley Martin Lieber), the original creator of this comic book hero, has his usual cameo role in this movie. He's the guy who drinks the gamma contaminated soda from the fridge.
Trivia: Steven Spielberg has a cameo as one of the doctors when Elliot and E.T. are 'hospitalized' inside the house.
Trivia: Stan Lee makes a cameo at the end of the movie as the FedEx man who says "Are you Tony Stank?"
Trivia: Does anyone recognize the guy who was eaten by the T-Rex in San Diego? It was the screenwriter of Jurassic Park and The Lost World, David Koepp.
Trivia: At the festival when the Green Goblin throws his grenades, before the shot of Parker, you see Stan Lee (creator of Spider-Man). He was supposed to pick up the little girl that he pushes to safety, but due to his age, after several takes he said if they wanted him to pick her up, they were going to be there all day. (01:04:10)
Trivia: Director Bryan Singer (X-Men among others) makes a cameo appearance on the bridge of the Enterprise. He's a non-speaking extra. When the Reman boarding party has beamed aboard and Riker and Worf leaves the Bridge to take care of the boarding party Singer is the officer who takes over Worf's tactical station. In the audio commentary on the DVD release Nemesis director Stuart Baird points out Bryan Singer's appearance and continues 'apparently he's a big fan of Star Trek'. (01:23:25)
Trivia: Stan Lee makes his customary cameo appearance as a security guard at the Smithsonian who is present when Steve Rogers steals his original Captain America suit from the museum display. (01:30:00)
Trivia: When Crichton talks to "Harvey" (Scorpius in his head) for the first time in the movie, Scorpius is dressed like Einstein. There is a blackboard with equations on it. One of them is "e = MC hammer". (00:21:30)
Trivia: Stan Lee makes his usual cameo as the guy that accidentally gets his car shrunk by Hope during the climactic chase. Sadly, this was the last Stan Lee cameo released before his death in November, 2018. (Although he had already filmed cameos for several other upcoming films before his death).
Trivia: Jimmy Buffet can be seen running back to get his margarita during the winged dinosaur attack on park visitors. (01:18:50)
Trivia: When the scientist says to the other man, "We're moving the Hubble," the long-haired man whom he is talking to is Michael Bay, the director of Armageddon.
Trivia: Stan Lee, who co-created the Hulk, and Lou Ferrigno, who played him in the 70's TV show, have cameos as a pair of security guards in the beginning of the film. Ferrigno later made another cameo as a security guard in the 2008 reboot.
Trivia: While Mr. Freeze is at Shaugnessy's, when Shaka smacks Dick across the room, he ends up flat on his back, and in the close-up when Dick raises his head, the buttons on his vest switch sides momentarily. Then the buttons revert back (noted in trivia because it's better when clicked through slowly). (00:24:25)
Trivia: Gene Barry and Ann Robinson, stars of the 1953 version of this movie, make a small cameo in this movie as Mary Ann's parents. They are at the end when the whole family is reunited.