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.