LINEUP
Members
MILESTONES
Records & firsts
Second-highest Billboard 200 entry for a K-pop debut album
"Color Outside the Lines" entered at number 15 in September 2025.
Record first-day sales for a K-pop debut EP
Set on the release of "Color Outside the Lines".
Two million albums sold within a year of debut
Cumulative sales passed the mark during the "GreenGreen" cycle in 2026.
BigHit Music's third group
The label's first new boy group after BTS and Tomorrow X Together.
DID YOU KNOW
Trivia & lore
- 01
The group describes itself as a "youth creator crew" and handles its own songwriting, production and creative direction.
- 02
James spent 2021 to 2022 in Trainee A, a BigHit pre-debut group that was shelved before it ever released anything.
- 03
The fandom name Coer (코어) blends the group's name with the word "core".
- 04
The pre-debut single "Go!" came out on August 11, 2025 — a week before the group officially debuted with "What You Want".
- 05
Leader Martin also goes by the Korean name Park Woo-joo; James is Taiwanese, making Cortis a multinational lineup from the start.
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 label spent the years afterwards putting together a team that could write, produce and direct its own work rather than receive it — an unusual mandate for a rookie act at this scale.
PRE-DEBUT
Go!
2025
The group surfaced a week ahead of schedule with the pre-debut single "Go!" on August 11, 2025, released with a music video that set the crew-video tone the group has kept since.
Anchor track: Go!
DEBUT
Color Outside the Lines
2025
The official debut single "What You Want" landed on August 18, 2025, followed by the first EP on September 8. It entered the Billboard 200 at number 15 — the second-highest chart entry any K-pop act has managed with a debut album — and set first-day sales records on the way.
Anchor track: What You Want
GreenGreen
2026
The second EP arrived on May 4, 2026, led by "RedRed", which had gone out three weeks earlier and became the group's biggest commercial release to date, pushing cumulative album sales past two million inside a year of debut.
Anchor track: RedRed
FAQ
People also ask
IF YOU LIKE THIS
Similar groups
INTERNAL LINKS