K-pop moves fast. One minute you're watching a group of teenagers debut with "Crown" and the next, they're headlining Lollapalooza as grown men. Honestly, if you still think of Tomorrow X Together (TXT) as "the babies of Big Hit," you haven't been paying attention lately.
Since their debut in March 2019, the group has evolved. We aren't looking at those 16-to-19-year-olds anymore. It's now January 2026, and the age dynamics within the group have shifted into a more mature era. People constantly search for how old are TXT members because, frankly, their "youthful" concept sometimes masks just how much time has actually passed.
The members are all now in their mid-20s.
The Current Ages of Every TXT Member (As of January 2026)
If you're looking for the quick numbers, here is the breakdown of where they stand right now. Remember, these are their international ages, which is what the global industry uses most often these days.
- Yeonjun: 26 years old
- Soobin: 25 years old
- Beomgyu: 24 years old
- Taehyun: 23 years old
- Huening Kai: 23 years old
Wait, 26? Yeah. Yeonjun, the "Legendary Trainee," is firmly in his mid-20s. It feels weird to some fans who still remember him as the first member revealed back in early 2019. But that’s the reality of the 4th generation of K-pop; they aren't the "new kids" anymore. They are the established leaders.
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Yeonjun: The Eldest Who Doesn't Act Like It
Yeonjun was born on September 13, 1999. In the world of K-pop, being born in the 90s almost makes you a veteran at this point. He turned 26 this past September. What's wild is that he was the only member who was already a legal adult when they debuted. He’s always had this "it boy" energy, but as he’s aged, it’s morphed from high-energy youthfulness into a more refined, professional charisma. You can really see it in his solo work, like "Ggum," which dropped in late 2024.
Soobin: The 25-Year-Old Leader
Soobin is the leader, but he’s actually the second oldest. Born December 5, 2000, he just celebrated his 25th birthday a few weeks ago. It’s funny because Soobin often jokes about his "introverted old man" energy. At 25, he’s essentially the glue of the group. He’s reached that age where he’s no longer the shy kid trying to find his footing as a leader; he’s now one of the most respected figures in the 4th gen.
Beomgyu: The Middle Child Energy at 24
Beomgyu, born March 13, 2001, is currently 24. He’ll be turning 25 in just a couple of months. He has always been the "mood maker," but as he’s gotten older, his interest in music production and guitar has taken center stage. Being 24 is a weird age in K-pop—you’re old enough to have serious artistic authority but young enough to still be part of the "youth" conversation.
The 02-Liners: Taehyun and Huening Kai
These two are the "babies," but calling a 23-year-old a baby is a bit of a stretch, right?
Taehyun (February 5, 2002) is 23.
Huening Kai (August 14, 2002) is also 23.
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They are only six months apart. Taehyun is often called the most "mature" because of his logical way of thinking, while Huening Kai still holds that maknae charm. But look at their recent performances. The physical growth is impossible to ignore. They aren't the skinny kids in shorts from "Cat & Dog" anymore.
Why the Question "How Old Are TXT Members" Is More Complex Than It Looks
Age in Korea used to be a whole thing with the "Korean Age" system, where you were 1 the day you were born and gained a year every New Year's Day. However, South Korea officially moved to the international system in 2023. This actually cleared up a lot of confusion for MOA (the fans). Before, you’d see conflicting numbers everywhere. Now, we just look at the birth year.
Still, the "vibe" of their age matters. TXT’s discography is literally built on the concept of growing up.
They started with the "Dream Chapter," which was all about the growing pains of puberty and finding friends. Then they moved into the "Chaos Chapter" and "Name Chapter," dealing with the harsh reality of adulthood and temptation. Now that the members are 23 to 26, their music is reflecting a much more adult perspective on life. You don't write songs like "DejaVu" with the mindset of a 16-year-old.
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The Military Question
You can't talk about K-pop ages without the elephant in the room: military service. In South Korea, men generally have to enlist by the time they are 28 or 30 (depending on certain deferments). With Yeonjun being 26, the clock is technically ticking, though he still has some time. This is why fans are so obsessed with tracking their ages right now. Every year is precious. We are currently in the "prime" years of TXT as a full five-member group before the inevitable enlistment cycles begin in the late 2020s.
Surprising Facts About Their Age Gaps
Most people think TXT is a very "tight" group in terms of age, and they are. There is only about a three-year gap between Yeonjun (the oldest) and Huening Kai (the youngest).
- September 1999 to August 2002: That’s it.
- Comparison: Compare that to a group like BTS, where there is a five-year gap between Jin and Jungkook.
- The Result: Because the age gap is so small, the power dynamic is very flat. They act more like a group of brothers or very close friends rather than having a strict hierarchy.
Honestly, this is probably why they haven't had the same "leader-heavy" friction some other groups face. They all grew up in the same cultural window. They all remember the same memes, the same music, and the same trainee struggles at Big Hit.
What This Means for the Future of TXT
As we move through 2026, expect the group to lean even harder into "adult" themes. We’ve already seen them experiment with rock, hyper-pop, and even some darker R&B. At 23-26 years old, they have the vocal maturity to pull off more complex arrangements that they couldn't have handled back in 2019.
The "It Boy" title Yeonjun carries has matured with him. It’s no longer about being the best dancer in the room; it’s about his influence on fashion and solo artistry. Same for Soobin—his stint as an MC and his growing presence in variety shows proves he's building a career that will last long after the "idol" tag changes.
If you’re a new fan, don't let the old music videos confuse you. They are men now.
Actionable Next Steps for Fans:
- Update your fansite calendars: If you're still using 2024 age charts, toss them. Yeonjun is 26, Soobin is 25, Beomgyu is 24, and the maknaes are 23.
- Watch the 2025/2026 Live Stages: Compare their "Crown" performances to their recent 2026 tour stages. The difference in vocal depth and stage presence is the best way to "see" their age.
- Monitor Bighit Music Announcements: With the oldest members hitting the mid-20s mark, keep an eye out for more solo projects or unit debuts, which is the standard path for groups at this stage of their careers.