코르티스
CORTIS
Members
5
Fandom
Coer
BigHit's self-producing teenagers, who treat a debut like a design project rather than a launch.
- Self-produced
- DIY
- Hip-hop roots
- Skate-video energy
- Gen-Z auteur
LINEUP
Members
| Member | Position | Birthday | Age |
|---|---|---|---|
| James | — | Oct 14, 2005 | 21 |
| Juhoon | — | Jan 3, 2008 | 18 |
| Martin | Leader | Mar 20, 2008 | 18 |
| Seonghyeon | — | Jan 13, 2009 | 17 |
| Keonho | Maknae | Feb 14, 2009 | 17 |
MILESTONES
Records & firsts
GreenGreen reached number 3 on the Billboard 200
May 2026, the group's second EP.
First K-pop group to headline an NBA All-Star halftime show
The 2026 NBA All-Star Celebrity Game at the Kia Forum, February 2026.
Two million sales for a debut album
Color Outside the Lines passed the mark on March 6, 2026 — the second K-pop group to do it after ZEROBASEONE.
"RedRed" topped the Circle Digital Chart and Melon's weekly chart
2026; it also set the record for most weeks at number one on Spotify's Daily Top Songs Korea among K-pop group songs.
Billboard 200 debut at number 15
Color Outside the Lines, September 2025.
Best New Artist, 2025 MAMA Awards
Plus Rookie Artist of the Year at the 40th Golden Disc Awards in January 2026.
DID YOU KNOW
Trivia & lore
The name takes six letters from the phrase "Color Outside the Lines" — which also became the title of the debut EP.
The fandom name Coer (코어) blends the group's name with the word "core", casting fans as the group's support.
James spent 2021 to 2022 in Trainee A, a BigHit pre-debut group that was shelved before it ever released anything.
Leader Martin carried Iceland's flag at the 2018 Winter Olympics, a year before he joined BigHit.
Before debut, James and Martin both worked on ILLIT's "Magnetic" and Tomorrow X Together songs.
The members have no fixed positions; each contributes to songwriting, production, video and choreography.
DISCOGRAPHY
Signature tracks
TIMELINE
The journey
ORIGIN
Trainee A and the long build
2021 — 2025
Cortis was assembled slowly and quietly. James trained inside Trainee A, a BigHit pre-debut group that was shelved in 2022, and the members spent a 2024 song camp in Los Angeles writing their own debut — an unusual mandate for a rookie act at this scale.
PRE-DEBUT
Go!
2025 — 2025
The group surfaced with the pre-debut single "Go!" on August 11, 2025, released with a music video shot in Los Angeles that set the crew-video tone the group has kept since.
Anchor track: Go!
DEBUT
Color Outside the Lines
2025 — 2025
The official debut single "What You Want", performed on treadmills, landed on August 18, 2025, followed by the first EP on September 8. It entered the Billboard 200 at number 15, set a first-day sales record among 2025 debuts, and the year closed with Best New Artist at MAMA.
Anchor track: What You Want
GreenGreen
2026
The group became the first K-pop act to headline an NBA All-Star halftime in February 2026. "RedRed" went out on April 20 and topped the Circle Digital and Melon weekly charts, the EP GreenGreen reached number 3 on the Billboard 200, and the first tour, Put Your Phone Down, sold out its North American dates.
Anchor track: RedRed
FAQ
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INTERNAL LINKS