!!Trivia Tropes:
* ActingForTwo: Duff plays Lizzie and Isabella in the movie.
* ActorAllusion: One is made with David and Robert Carradine in the episode where Gordo and Matt make a kung fu movie.
* DawsonCasting:
** 17-year old Adam Lamberg as Gordo; because he hit puberty late, he is actually able to pass as a 12-year old pretty convincingly in the pilot, and he managed to remain shorter than Lizzie and Miranda all the way through to the end.
** 18-year old Kyle Downes as middle schooler Larry Tudgeman. Made more {{Egregious}} by the fact that, in the previous series he was in (the RetroactiveRecognition-palooza ''HigherGround''), he was cast as a troubled ''high schooler''.
** Also comes up in ConversationalTroping when Miranda acts in a school play:
-->'''Animated Lizzie:''' Wow, Miranda's officially in love with acting. Maybe when she's thirty years old, she can play a teenager on ''Series/DawsonsCreek''.
* {{Defictionalization}}: In one episode, Lizzie was inspired to spend more time with her mother after reading a novel titled ''The Orchids and Gumbo Poker Club'' for a school assignment. Disney later published an actual novel with that title, with notes from Lizzie included in the margins.
* FakeNationality: Lalaine (Miranda) is actually of Filipino descent.
** Yani Gellman (Canadian/Australian) as Paolo (Italian) in TheMovie. Also in the movie, Hilary Duff herself [[DoubleVision plays Isabella]], with the result that Isabella loses her Italian accent whenever she's singing.
*** To be fair, Hilary's sister Haylie seems to provide Isabella's singing voice, but she is also not Italian.
*** [[https://www.youtube.com/watch?v=HUgbwRKbs2Q An Italian singer losing her accent while singing is not exactly unrealistic.]]
* HeyItsThatGuy: Miranda's a [[Series/BuffyTheVampireSlayer Potential]]?
** Also, Lizzie is the granddaughter of [[Series/StarTrekTheNextGeneration Data]]. [[note]]No, no, Hilary Duff didn't guest on ''[[Series/StarTrekTheNextGeneration TNG]]'', but Hallie Todd (Lizzie's mom) did, as Data's "daughter" Lal.[[/note]]
** Matt was in a commercial directed by [[{{Series/Heroes}} Sylar]].
** [[Series/EverybodyLovesRaymond Ray's]] mother is Gordo's grandmother.
** [[Series/KungFu Caine]] taught Matt martial arts.
** The principal would later go on to [[Series/TheSuiteLifeOfZackAndCody run a hotel]].
** Let's not forget that Miss Ungermeyer in TheMovie is [[WesternAnimation/FamilyGuy Lois Griffin]].
** Also in the movie, Paolo is [[PrettyLittleLiars Officer Garrett]].
** [[Film/RevengeOfTheNerds Lewis]] is Lizzie's dad.
* HeyItsThatVoice: Lizzie's German voice actress is also [[WesternAnimation/AvatarTheLastAirbender Azula]].
* TechnologyMarchesOn: In an earlier episode, Matt and Lanny try to raise the money to buy ninety-dollar walkie-talkies. A floppy disk and a VHS tape make appearances in the same episode.
** Throughout the series, Lizzie, Miranda, and Gordo have landlines in their bedrooms rather than cell phones.
** In ''Rumors'', Lizzie and Miranda are chatting on a fake ICQ client while using ''Windows 98''!
** In "Lizzie and Kate's Big Adventure", Lizzie and Kate have to go to an Internet café in order to get [=DSL=].
* WhatCouldHaveBeen: They seemed to be building up to a romance between Larry and Miranda before the latter left the show. The storyline where he hooks up with a minor recurring character was most likely originally for her. Also, Sara Paxton was also considered for the role of Lizzie.
** There were plans to spin off a "Lizzie in high school" sitcom onto ABC, but never got to be produced, due to Hilary Duff leaving after the show's completion.
** A pilot for an unaired spinoff series called "What's Stevie Thinking?" was allegedly shot (or at least written), concerning the adventures of Miranda's sister Stevie. Stevie was to be played by a very young SelenaGomez.
** Towards the show's end, there was a contest for three girls to have animated versions of themselves to have a cameo with the animated Lizzie. The show ended before this could have happened.

!!Additional Trivia:
* After the 9/11 terrorist attack, the clocks in Lizzie's school are set at 9:11 for the episode directly after it.
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