I’ve always been a huge fan of the 'Descendants' franchise, and the age dynamics in 'Descendants 3' are actually pretty interesting when you break them down. Most of the core characters are in their late teens, reflecting their high school setting. Mal, Evie, Carlos, and Jay are all around 17–18 years old, which makes sense given their senior-year arc. Ben, being the king, is slightly older—probably 18 or 19—since he’s already ruling Auradon. The younger VKs like Celia Facilier are around 13–14, adding a fun contrast to the older group. Uma’s crew, including Harry and Gil, seem to hover around 16–17, fitting their rebellious but still adolescent vibe.
What’s cool about these ages is how they shape the story. Mal and the others are at this crossroads between childhood and adulthood, which mirrors their struggle to define themselves beyond their parents’ legacies. The younger characters, like Celia, bring this wide-eyed energy that reminds the older kids (and the audience) of how far they’ve come. It’s subtle, but the age gaps create these little pockets of mentorship and nostalgia, especially in scenes where Mal advises Celia or Ben reflects on his early days with Mal. The writers nailed that balance of youthful energy and growing maturity—it’s one of the reasons the movie feels so heartfelt.