CORTIS is a new K-pop group that started on August 18, 2025, and they are completely different from everyone else! Forget the usual groups, these five artists are super talented and love to break the rules.
CORTIS stands for “COLOR OUTSIDE THE LINES,” and once you see their work, you’ll know why. I’m obsessed with how much they do themselves, from writing their own music (like Seonghyeon) to creating their own dances.
They are changing what the 5th generation of K-pop means. I have all the details on the five CORTIS members: Martin, James, Juhoon, Seonghyeon, and Keonho. Time to pick your bias!
CORTIS Members 2026: Quick Introduction
| Label | BIGHIT MUSIC (HYBE) |
| Debut Date | August 18, 2025 |
| Pre-Release Date | August 11, 2025 (“GO!”) |
| Debut Song (Official) | “What You Want” |
| Number of Members | 5 |
| Fandom Name | COER (Announced November 2025) |
| Generation | 5th Gen K-pop |
| Instagram Handle | @CORTIS |
| X (Twitter) Handle | @CORTIS_bighit |
If you haven’t jumped on the CORTIS hype train yet, you need to! These five guys – Martin, James, Juhoon, Seonghyeon, and Keonho – are the newest “Creator Crew” from BIGHIT MUSIC (the label behind BTS and TXT).
They debuted on August 18, 2025, and they are all about breaking the rules. Seriously, their name is an acronym for COLOR OUTSIDE THE LINES! They are completely self-produced and redefine what a K-pop idol can be. We finally got our official fandom name: COER!
Get ready to stan these talented teens.
CORTIS Members Age, Profiles & Fun Facts
Time to dive into the five geniuses that make up CORTIS. Seriously, how did BIGHIT MUSIC manage to put this much talent into one group? It’s unfair!
- Martin
The leader is a certified production prodigy! He’s Canadian-Korean, turning 18 in 2026, and already has huge song credits for TXT, ILLIT, and LE SSERAFIM. His MBTI is often listed as ENFP, so no wonder he’s the leader.
- James
The oldest member was born in 2005. He’s got a Thai-Chinese background and is a dance legend, not just in K-pop but with a crazy ice hockey background. He’s one of the main forces behind their sharp choreography.
- Juhoon
Known for his incredible visuals (he was a youth model!) and his super emotional vocal tone. He’s also deeply involved in songwriting and brings a lot of Seoul charm to the team.
- Seonghyeon
The quiet powerhouse. While he might seem soft-spoken, he is their primary “Topliner,” meaning he writes those melodies that get stuck in your head. He’s a total creative force with a sharp edge.
- Keonho
The adorable maknae (youngest) of the group, born on Valentine’s Day! At 16, he’s a key part of the group’s video production team. He’s already been called a “5th Gen It Boy” for his stunning looks.
1. Martin
| Real Name | Martin Edwards Park |
| Age | 17 (Born 2008) |
| Height | 190.5 cm (6’3”) |
| Zodiac Sign | Pisces |
| Nationality | Canadian-Korean |
| Role in group | Leader, Producer, Songwriter |
| Languages | Korean, English |
| Birthdate | March 20, 2008 |
| Instagram handle | @CORTIS (group account) |
Martin is our towering, incredibly talented leader. I mean, the fact that he was writing and producing hit songs for TXT and ILLIT (like “Magnetic”!) before his own debut is just insane. He drives the group’s unique sound and keeps all the members focused. He’s got that great mix of Canadian chill and BigHit leadership!
2. James
| Real Name | Zhao Yufan |
| Age | 19 (Born 2005) |
| Height | 178 cm (5’10″) |
| Zodiac Sign | Libra |
| Nationality | Thai-Chinese (Hong Kong) |
| Role in group | Rap/Vocal, Choreographer, Songwriter |
| Languages | English, Chinese, Thai, Korean, Japanese |
| Birthdate | October 14, 2005 |
| Instagram handle | @CORTIS (group account) |
James is the oldest member and seriously gives off main character energy. His Thai-Chinese background means he’s fluent in four languages (talk about a global star!). He brings the heat on stage and off, thanks to his background in ice hockey (semi-pro for 10 years!). He helps develop CORTIS’s killer choreographies.
3. Juhoon
| Real Name | Kim Ju-hoon |
| Age | 17 (Born 2008) |
| Height | 175–176 cm (5’9″) |
| Zodiac Sign | Capricorn |
| Nationality | Korean |
| Role in group | Vocal, Songwriter |
| Languages | Korean, English |
| Birthdate | January 3, 2008 |
| Instagram handle | @CORTIS (group account) |
Juhoon has such expressive eyes and a lovely face, so it makes sense he was a youth model before debuting! Going to an international school made his English skills very sharp. He is one of the group’s strongest singers, and he makes their songs sound very emotional. He is also always working on new music.
4. Seonghyeon
| Real Name | Eom Sung-hyun |
| Age | 16 (Born 2009) |
| Height | 180 cm (5’11″) |
| Zodiac Sign | Capricorn |
| Nationality | Korean |
| Role in group | Vocal, Topliner (Melody Writer), Lyricist |
| Languages | Korean |
| Birthdate | January 13, 2009 |
| Instagram handle | @CORTIS (group account) |
Don’t think Seonghyeon is boring just because he is quiet! He is actually a creative genius. He is the group’s main “Topliner,” which means he writes all the memorable melodies (the catchy tunes). Even though he is soft-spoken, his ideas are brilliant and often become the basis for CORTIS’s best songs. He definitely shows that the quiet people can be the most talented.
5. Keonho
| Real Name | Ahn Geon-ho |
| Age | 16 (Born 2009) |
| Height | 178 cm (5’10″) |
| Zodiac Sign | Aquarius |
| Nationality | Korean |
| Role in group | Maknae, Producer (Video/Music) |
| Languages | Korean |
| Birthdate | February 14, 2009 |
| Instagram handle | @CORTIS (group account) |
Keonho is the youngest (the maknae) and the most loved member of the group! He was born on Valentine’s Day. It’s no surprise that people are already calling him the “5th Gen It Boy.” He is very important to the group’s unique music videos. This proves that even the youngest member helps a lot with their “Creator Crew” work.
Who Is The Youngest Member Of CORTIS?
Keonho is the adorable “baby” of the group and the official youngest member (maknae)! He was born on February 14, 2009. He shares the 2009 birth year with Seonghyeon. A Valentine’s Day birthday fits his sweet personality perfectly!
Keonho brings fresh, young energy to CORTIS. Even though he is the youngest, he is important to the “Creator Crew” because he does a lot of work on making videos and music. He is already crushing it as a new K-pop star!
What Makes CORTIS Different?
Okay, let’s get real. In K-pop, everybody is talented. But CORTIS is playing a totally different game. They are not just idols; they are BIGHIT’s new “Young Creator Crew,” and that’s a massive distinction!
Here is why they are shaking up the 5th generation:
- No Fixed Positions (Except Leader)
They truly don’t stick to those rigid roles we’re used to! Sure, Martin is the leader, but beyond that, they are all co-creators. They trade off on vocal parts, rap parts, and even choreography. They literally gather their heads together to create a single line of lyrics or a dance move, making everything 100% theirs. I love that freedom!
- The Self-Produced Advantage
When I say self-produced, I mean everything. All five members – Martin, James, Juhoon, Seonghyeon, and Keonho – have credits on their debut EP. Martin and James were even producing bangers for TXT and ILLIT before their own debut. Seonghyeon is the main Topliner (melody writer), and Keonho is neck-deep in video production.
- Raw Gen Z Vibe
The group’s idea is “COLOR OUTSIDE THE LINES” for a good reason! They are not trying to look super polished and perfect. Their first videos, like the one for “GO!,” look like five friends just grabbed a camera and started recording. It feels real and honest. That’s why we, the fans, feel so connected to them.
In short, CORTIS is here to redefine what a K-pop group can be. They are artists first, and I am obsessed with watching them own their entire creative process!
Conclusion: CORTIS Members Are Martin, James, Juhoon, Seonghyeon And Keonho
So there you have it, the full rundown on the five CORTIS members! Martin, James, Juhoon, Seonghyeon, and Keonho are truly changing the K-pop landscape.
They are not just idols; they are artists who write their own music, craft their own choreography, and even involve themselves in video production. That’s why I’m calling them the ultimate “Creator Crew” of the 5th Generation!
They fully embody their name’s meaning: COLOR OUTSIDE THE LINES. With BIGHIT MUSIC guiding them and their incredible self-produced talent, CORTIS is only just beginning their journey. Time to settle in and enjoy the ride, COERs!
FAQs
No, that rumor is false! Keonho is still getting the required education. Like most young idols, he does school through private lessons or different schooling while working as an artist.
James is the oldest! He was born in October 2005. He is the “big brother” who is famous for his dance skills and his amazing Thai-Chinese background.
CORTIS only has five members (Martin, James, Juhoon, Seonghyeon, and Keonho). The rumor about a “CORTIS 6” probably came from guesses about who would be in the group when they were still trainees.
Yes, James is mixed! He is Thai and Chinese. He was born in Hong Kong. He can speak four languages, and he brings that cool global background to the group.
CORTIS is short for COLOR OUTSIDE THE LINES. This name means the group wants to break the rules and do things differently from typical K-pop groups.