The Age Spectrum Of Nmixx A Deep Dive Into Member Demographics

Breaking Down NMIXX's Member Ages

NMIXX has seven members, though one has since departed. The age spread across the group is fairly tight, which is actually kind of interesting when you look at it up close. I remember first getting pulled into this during a fan discussion where someone tried to build a timeline of debut dates and member milestones, and it got messy fast because of how different dating systems handle the same person. Here are the members with their actual international ages and Korean age equivalents: Lily — Born April 15, 2002. International age: 24. Korean age: 25 (as of 2026).

Haewon — Born November 30, 2003. International age: 22. Korean age: 23. Sullyoon — Born January 26, 2004. International age: 22. Korean age: 23. Bae — Born October 3, 2004. International age: 21. Korean age: 23.

Jiwoo — Born April 13, 2005. International age: 21. Korean age: 22. Kyujin — Born March 26, 2006. International age: 20. Korean age: 21. Jinni — Born May 19, 2004. International age: 22. Korean age: 23. She left the group in February 2024 due to health reasons, but her demographics were part of the group's history for about a year and a half.

The age gap between the oldest and youngest current member is four years and eleven months. That's smaller than a lot of other 7-member K-pop girl groups. TWICE has an eight-year spread. (G)I-DLE is about six years. So NMIXX is on the tighter end, which affects how they're positioned in terms of seniority and stage dynamics. When I was compiling this for a fan project, I ran into a specific problem with Korean age calculations around New Year's Day. Korean age jumps everyone up a year on January 1st, not on their birthday. So on January 2, 2026, Lily's Korean age became 25 even though she hadn't had her birthday yet. But if you calculated it from an international age standpoint, she'd still be 23 until April. I initially got confused about whether to use Korean or international age for a roster comparison piece I was writing, and I ended up just listing both to avoid any confusion. That's probably the cleanest approach unless you have a specific reason to pick one system. Another thing that trips people up: Jinni's departure complicates any "average age" calculation. If you include her, the average international age of the full original lineup is about 21.7. Remove her and it drops to about 21.5. The difference is tiny, but it matters if you're making a statistical point about the group's maturity level for something like contract negotiations or sub-unit formations. People rarely account for the departed member when they do these calculations.

The two oldest members, Lily and Haewon, serve as the visual and vocal anchors in certain performance setups, and their ages come into play during variety content where seniority jokes are common. Sullyoon and Bae being born within six months of each other means they often share that "mid-rank" positioning in member order graphics. Jiwoo and Kyujin are the youngest, which sometimes leads to them being grouped as the "maknae line" even though there's technically a three-member gap between Jiwoo (oldest maknae) and Kyujin (actual youngest). One counter-intuitive thing about NMIXX's age structure: despite Lily being the eldest, she isn't the group's leader. Haewon holds the leader position, and that's standard in K-pop — leadership is about capability, not birth order. But it does mean the official member ranking by age doesn't match the ranking by position. That's true for most groups, but NMIXX makes it slightly more obvious because the age gaps are so small that people assume the eldest should naturally take charge. If you're building any kind of demographic profile or comparison chart for NMIXX, the main pitfall is mixing Korean and international ages without labeling which system you're using. I've seen countless fan wikis and Reddit threads where someone compares "Lily's age" to "Kyujin's age" and gets it wrong because one source uses Korean age and the other uses international. Always specify which system you're using. It saves a lot of follow-up comments and corrections.