CORTIS has been active for less than a year, and they’ve already landed a Top 3 spot on the Billboard 200 and become the only boy group booked at Lollapalooza. In Korea, they’re known as “BTS’s juniors” — but internationally, they’re already being treated as global stars in their own right. Here’s everything from member basics to their international popularity that fans outside Korea actually want to know.
Who Is CORTIS?
CORTIS is BigHit Music’s first new boy group in six years — the label behind BTS and TOMORROW X TOGETHER (TXT) — debuting on August 18, 2025, with the digital single “What You Want.” The group’s name is drawn from six irregular letters in the phrase “COLOR OUTSIDE THE LINES,” reflecting a mission to think freely without being bound by conventional standards.
Their defining trait: all five members are directly involved in songwriting, composing, choreography, and video production — they’re a true “creator crew,” not just performers. Even before debut, members had already worked on tracks for senior HYBE artists, including TXT’s “Deja Vu,” ILLIT’s “Magnetic,” and ENHYPEN’s “Outside” — meaning their skills were already proven before day one.
Meet the Members
- Martin — The leader and oldest member. Korean-Canadian, fluent in both English and Korean, and had already produced tracks for TXT, ILLIT, and LE SSERAFIM before CORTIS debuted.
- James — A dance powerhouse from Taipei, holds a black belt in taekwondo, and spent 10 years playing ice hockey at a semi-pro level.
- Juhoon — A former child model who attended an international school, sharpening his English skills along the way.
- Seonghyeon — A topliner and lyricist known for a quiet demeanor paired with sharp creative instincts.
- Keonho — The youngest member, playing a key role in the group’s music video production.
What International Fans Really Want to Know: “Is CORTIS Actually Popular?”
Short answer: yes — and their international numbers are staggering for a group barely a year into their career.
Billboard performance tells the story clearly. Their debut EP Color Outside the Lines landed at No. 15 on the Billboard 200, and their second EP GREENGREEN (May 2026) jumped to No. 3 — making CORTIS the fastest K-pop boy group (excluding project-based groups) to crack the Billboard 200 Top 3 in the past five years. Lead single “REDRED” reached No. 43 on the Billboard Global 200 and No. 17 on the Bubbling Under Hot 100, putting them right at the doorstep of the Hot 100 itself.
Major stage bookings back this up. In 2026, CORTIS became the first K-pop act to headline the Opening Night of the NBA Crossover Concert Series at NBA All-Star, and returned the next day for the All-Star Game halftime show. That same summer, they were booked as the only K-pop boy group at Lollapalooza Chicago 2026, sharing the lineup with Charli XCX, Tate McRae, and Lorde.
Their tour scale is unusual for a rookie act, too. Their first North American tour, “PUT YOUR PHONE DOWN,” kicks off in August 2026 across six cities — Toronto, New York, Atlanta, Irving, Los Angeles, and San Francisco — and their Lollapalooza aftershow sold out immediately upon release.
Streaming and social numbers confirm the growth trajectory. Cumulative streams have surpassed 600 million, with the group adding 100 million streams in just 20 days after crossing the 500-million mark. Their Instagram following has topped 12 million, and they’ve landed global brand partnerships with Apple, the NBA, MLB, and Louis Vuitton.
So, Is “Next BTS” the Right Label?
The members themselves are careful about the comparison. In interviews, they’ve acknowledged that their seniors paved the way for the opportunities they now have, while emphasizing that they’re focused on carving out their own identity. Musically, their sound — blending psychedelic rock guitar riffs with boom-bap hip-hop — sits apart from typical K-pop production, which suggests “the next generation building on BTS’s infrastructure while carving out their own genre” is a more accurate description than “the next BTS.”
Quick Recap
- CORTIS = 5-member boy group under BigHit Music, debuted August 2025
- Members: Martin (leader), James, Juhoon, Seonghyeon, Keonho — all involved in songwriting, production, and choreography
- Billboard 200: debut EP at #15 → second EP at #3
- 2026: NBA All-Star performance + only K-pop boy group at Lollapalooza
- First North American tour launches August 2026
Curious about CORTIS’s next comeback or upcoming tour dates? Now’s the time to follow them — at this growth rate, the next time you search their name, you might already be “late” to the fandom.
