* ActorAllusion:
** In the "Video-a-Rooney" music video, Holden is seen [[Film/TeenBeachMovie surfing]].
** Towards the end of the series Liv gets cast in a role in a Broadway musical described as 'Just like Hamilton only not.' When Holden comes back in "Voice-a-Rooney," he mentions he's living in New York, and tells her to look him up once she gets there. In reality, Jordan Fisher was actually in New York... working on Broadway, as John Laurens in Theatre/{{Hamilton}}.
** And one that counts as an InJoke: in "Repeat-A-Rooney," after Liv has done a sixth-grade rendition of the balcony scene from ''Theatre/RomeoAndJuliet'' playing both parts, Liv says [[ConfessionCam to the viewers]] "Nailed it! They say playing two roles is tough, but... whatever."[[note]]Oh, the sixth-grade thing? It seems that when Liv went off to Hollywood for ''Sing It Loud'' she didn't complete a project for sixth grade, which means she never technically finished the grade, and she has to do the project in class or she can't graduate.[[/note]]
** Grandma Janice, like [[Series/ThePattyDukeShow Cathy Lane]], is a world traveler.
* ActorSharedBackground: The half-Korean Creator/PiperCurda playing Korean popstar Kathy Kan.
* CastingGag: The voices of Linda and Heather in "Champ-A-Rooney" are Emmy Buckner and Shelby Wulfert, who are the body doubles for Liv and Maddie in scenes that both twins are in. They also reprise the roles, fully on-screen, in "Linda and Heather-a-Rooney."
* TheCastShowoff: Besides her singing, Dove is also a fluent French speaker, which was a plot point in "Vive-La-Rooney"
* TheDanza:
** Creator/JoeyBragg, who portrays Joey Rooney.
** One of Dove '''Olivia''' Cameron's [[ActingForTwo two roles]] is '''Olivia''' "Liv" Rooney.
** In-universe: One of the actors on Liv's show, Priya, plays a character named Priya. Similarly, the actresses who play ''Linda and Heather'' are called... Linda and Heather.
* DawsonCasting: Jessica Marie Garcia, who is 10 years older than her character Willow. She was 26 when the show premiered and 30 when it ended.
* DirectedByCastMember: Benjamin King directed "Repeat-A-Rooney."
* PlayingTheirOwnTwin:
** Dove Cameron as Liv and Maddie. She uses a ValleyGirl tone of voice for the former and a variant on her real voice for the latter.
** Becomes Playing Their Own Triplet in "Helgaween-A-Rooney."
** Also happens [[Series/ThePattyDukeShow again]] with Patty Duke portraying Janice and Hillary.
* RomanceOnTheSet:
** Dove Cameron and dated ([[http://www.people.com/article/dove-cameron-ryan-mccartan-engagement-proposal-was-surprise?xid=rss-fullcontent and in April 2016 became engaged to]]) Ryan [=McCartan=], who portrays her (Maddie's) boyfriend, Diggie. Sadly, the engagement was broken off that October.
** Joey Bragg is dating Audrey Whitby, who guest starred in a couple of episodes as one of Joey's fellow cosplay enthusiasts/romantic interest.
* StuntCasting: In "Grandma-A-Rooney," Patty Duke plays Grandma Janice and Great-Aunt Hillary. [[Series/ThePattyDukeShow She has some experience in playing twins.]] Also counts as ActorAllusion. And as a reference from their show, Maddie calls them "a crazy pair!"
* WhatCouldHaveBeen:
** It was originally planned to have just the twins, a separate project based around Joey Bragg was folded in.
** The plot is a rehash of a pilot called ''Bits and Pieces'' which was picked up by Disney Channel but subsequently reformatted into this show. All the cast was exactly the same too, but with Dove Cameron playing a single role and Joey Bragg apparently getting the emphasis. Instead of a twin, the sister would've been played by Cozi Zuehlsdorff who now plays Liv's friend Ocean on the show. The ConfessionCam elements are a holdover from the ''Bits and Pieces'' pilot, too.
** There is a possibility, given her enjoyable experience filming "Grandma-A-Rooney", striking friendships with the cast, crew and creative team of the series towards the end of her life, that had she not gotten ill with sepsis not long after her appearance, that Patty Duke may have reprised her roles of Grandma Janice and Great Aunt Hillary at some time in the fourth season. Heartwarmingly, the show paid tribute to Patty by [[ShoutOut displaying a very visible framed photo]] of her as Grandma Janice, on the table behind the sofa of Aunt Dena's living room for the season 3 finale (and all of season 4).
** The final season was set to have 20 episodes, but was cut to 15 due to Dove Cameron filming ''Descendants 2''.
* WordOfSaintPaul: Joey Bragg [[http://www.justjaredjr.com/2017/03/21/liv-maddies-jillow-are-100-meant-to-be/ believes]] that [[spoiler: Joey and Willow are meant to be and will one day get back together for good]].
* WrittenByCastMember: Creator/KaliRocha co-wrote "[=BFF=]-A-Rooney", "Neighbors-A-Rooney," "Vive-La-Rooney," and "Tiny Houses-A-Rooney."
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