'Descendants 3' trivia and fun facts
Ursula's tentacles
Harry and Gil are the only Villain Kids whose parents never made appearances in the franchise. Uma's mother Ursula did appear in Los descendientes 2 (2017), but only her tentacles were shown along with her voice being heard of offscreen.
Jamal Sim
Jamal Sims's 3rd Disney project. His first was the theatrically released film Hannah Montana: La película (2009), released 10 years prior, and Aladdín (2019), released earlier that year.
Hints
The film was teased at the end of Los descendientes 2 (2017) with Uma saying "You didn't think this was the end of the story did you?". There'd also been several other hints and possibilities leading to a 3rd film prior to confirmation in February 2018 over a week before the teaser announcement during Zombies (2018).
Disney past
Booboo Stewart is the only actor of the 4 Main Villain Kids to have not appeared in any episode of the Disney Channel series Austin y Ally (2011). Cameron Boyce was in "Big Dreams and Big Apples" (the first part of the crossover with Boyce's old show Jessie (2011)), Sofia Carson was in "Princesses and Prizes", and Dove Cameron was in "Duos and Deception". Booboo Stewart was in good luck Charlie.
Without Mulan
Lonnie (daughter of Mulan and Shang) is the only character in the franchise who does not appear in this film.
Third part
First Disney Channel Original Movie Threequel since The Cheetah Girls: Un mundo (2008) 11 years prior, not counting High School Musical 3: Fin de curso (2008) which was released Theatrically instead of being a DCOM.