Dahyun hit 28 on Tuesday, and TWICE made sure the day got a proper send-off on the group’s official Instagram. The twicetagram account posted “Happy Birthday DAHYUN” alongside the hashtag #HappyDAHYUNday. It’s the same naming format the group uses for every member’s birthday – a small tradition ONCE looks forward to each time.
Fans flooded the comments with birthday messages in Korean, Japanese, and English, among other languages. The post collected over 60,000 likes by Tuesday afternoon. Comment sections on TWICE birthday posts tend to run long. Fans from across Asia, North America, and South America all show up in the same thread.
Dahyun, whose full name is Kim Da-hyun, has been part of TWICE since day one. She earned her spot in the group through SIXTEEN, a JYP Entertainment survival competition that aired in 2015. Out of the full trainee pool, nine made the final lineup: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu. They debuted together on October 20, 2015. That nine-member lineup has held for over a decade without a single change. Group reshuffles are a constant in K-pop. What TWICE has maintained is genuinely rare.
The discography backs up the longevity. “Cheer Up” and “TT” became defining K-pop songs in 2016. “What is Love?” and “FANCY” kept the momentum going a couple of years later. Japanese-language releases built a strong secondary fanbase. By the early 2020s, TWICE was headlining arenas and stadiums across North America and Europe. That kind of reach took years to build.
Dahyun came into TWICE as a rapper and has stayed one of the group’s most recognizable personalities on and off stage. Variety show appearances have been a consistent part of her profile – her quick humor tends to land well in that format. She’s also stayed close to ONCE between group releases through live streams, behind-the-scenes content, and solo brand campaigns.
Dahyun has been with TWICE for 11 of her 28 years. The group’s arc from trainee competition to global headliners is her entire adult career. ONCE has watched it in real time, and that kind of familiarity runs deep.
K-pop fandom culture treats member birthdays as real events. TWICE’s fanbase puts genuine energy into them. The #HappyDAHYUNday hashtag is circulating today. Fan-organized projects – streaming pushes, video compilations, charitable drives – are a standard part of how ONCE marks the occasion.
TWICE hasn’t shared any major release news for mid-2026 yet. Their bigger announcements have historically come in the fall. ONCE knows that rhythm well. For today, the focus stays on Dahyun.
Twenty-eight and counting.
