CORTIS Members Guide: Everything New Fans Need to Know
Meet CORTIS, BigHit's 5-member group that hit 500M Spotify streams faster than any K-pop act ever. Members, music, and how to follow them.
Who Are CORTIS?
CORTIS is a five-member boy group under BIGHIT MUSIC — the label’s first new boy group since TOMORROW X TOGETHER. The name is an acronym for COLOR OUTSIDE THE LINES, and that’s not just branding: all five members write, compose, choreograph, and even shoot their own video content.
They debuted on August 18, 2025 with the single “What You Want” from their debut EP Color Outside the Lines, and became the fastest K-pop group in history to reach 500 million Spotify streams. Their second EP Greengreen proved the debut was no one-off.
Members
| Name | Role | Quick Facts |
|---|---|---|
| Martin | Leader | Born in Seoul, partly raised in Ottawa, Canada. Tallest member. |
| James | Eldest | Thai–Hong Kong background; speaks five languages (EN/ZH/TH/KO/JA). Singer, songwriter, choreographer. |
| Juhoon | Vocalist | Former youth model; international-school English; the group’s emotional voice. |
| Seonghyeon | Main Vocalist, Lead Dancer | Born Jan 13, 2009. Topliner and lyricist — credited on all five debut EP tracks. |
| Keonho | Maknae | Born Feb 14, 2009. The youngest member. |
Discography So Far
- Color Outside the Lines (2025) — debut EP, lead single “What You Want”
- Greengreen (May 4, 2026) — second EP, led by the pre-release single “REDRED” (April 20, 2026)
How to Follow CORTIS
- Official profile: BIGHIT MUSIC — CORTIS
- Community: CORTIS connects with fans on Weverse — an official fandom name hasn’t been announced yet
FAQ
When did CORTIS debut? August 18, 2025, with “What You Want” from the EP Color Outside the Lines.
What does CORTIS stand for? It’s an acronym for “COLOR OUTSIDE THE LINES” — a statement about breaking K-pop conventions.
Who is the leader of CORTIS? Martin, who was born in Seoul and spent part of his childhood in Ottawa, Canada.