Five teenagers, one label, and zero rules.
Most K-pop groups follow a set formula- fixed roles, assigned positions, a leader who leads, and vocalists who sing.
CORTIS throws all of that out the window. These five boys write their own songs, build their own choreography, and even direct their own music videos.
And they did all of this before most of them turned 18.
Let’s know everything about the CORTIS members Martin, James, Juhoon, Seonghyeon, and Keonho.
What is CORTIS?
CORTIS is a five-member South Korean boy group under BIGHIT MUSIC, a label that is also home to BTS and Tomorrow X Together.
The group officially debuted on August 18, 2025, with their first digital single, “What You Want.“
CORTIS is an acronym taken from the phrase “COLOR OUTSIDE THE LINES.” The name reflects their core idea, which is to think freely and break away from the standards the world sets.
All five members are involved in writing songs, building choreography, and creating video content.
They are not just performers. They are the ones behind the work, too.
CORTIS Members Age and Profile
CORTIS has five members: Martin, James, Juhoon, Seonghyeon, and Keonho.
Before we get into each member’s full profile, take a look at the five CORTIS members, along with their full names and ages in 2026.
| Stage Name | Full Name | Age (2026) |
|---|---|---|
| Martin | Martin Edwards Park | 18 |
| James | Zhao Yufan | 20 |
| Juhoon | Kim Juhoon | 18 |
| Seonghyeon | Eom Seonghyeon | 17 |
| Keonho | Ahn Keonho | 17 |
1. Martin: The Leader and Producer
Full Name: Martin Edwards Park
Birthday: March 20, 2008
Nationality: Canadian-Korean
Martin is the leader of CORTIS and is one of the most accomplished producers in the group, with a list of song credits that most artists spend years building.
Before CORTIS even debuted, Martin had already worked on tracks for some of HYBE’s biggest acts.
He co-produced “Magnetic” for ILLIT, “Deja Vu” and “Miracle” for TXT, and “Outside” for ENHYPEN.
He holds dual Canadian-Korean citizenship and is fluent in both English and Korean.
Martin joined BIGHIT Music sometime between 2019 and 2020, giving him several years of training before the group’s debut.
2. James: The Oldest Member and Dance Force
Full Name: Zhao Yufan
Birthday: October 14, 2005
Nationality: Thai-Chinese
James is the oldest member of CORTIS and the only one who was an adult when the debuted.
With a Thai-Chinese background, he is fluent in four languages, giving the group a strong international presence.
Before debuting with CORTIS, James was part of Big Hit’s Trainee A and worked on choreography and songwriting for Magnetic and Deja Vu.
He is one of the key people behind CORTIS’s sharp choreography and brings a physical intensity to the stage.
3. Juhoon: The Vocalist with a Model’s Eye
Full Name: Kim Juhoon
Birthday: January 3, 2008
Nationality: Korean
Juhoon is one of the group’s strongest vocalists, known for the emotional quality he brings to every song.
Before joining Bighit Music in 2023, he worked as a child model, appearing in campaigns for various fashion brands and in music videos for Vixx, Zion.T, and Melo Mance.
That early experience gave him a sharp eye for visuals and strong stage control from a young age.
He attended an international school, which helped him build solid English skills. Within the group, Juhoon is known as the member who brings everyone’s opinions together.
4. Seonghyeon: The Quiet Creative
Full Name: Eom Seonghyeon
Birthday: January 13, 2009
Nationality: Korean
Seonghyeon is the group’s main topliner, which means he is the person behind most of the melodies you can’t get out of your head.
He started training with BIGHIT Music at just 13 years old, giving him nearly five years of experience before his debut. During that time, he worked on over 100 tracks, showing just how serious he was about his craft.
He took his GED to focus fully on training, a decision that reflects how committed he was from a young age.
Despite being soft-spoken, he carries a lot of weight within the group. He is the type who says less but delivers more.
He once performed with an injured finger rather than miss a stage, which tells you everything about his work ethic.
5. Keonho: The Maknae with Big Energy
Full Name: Ahn Keonho
Birthday: February 14, 2009
Nationality: Korean
Keonho is the youngest member of CORTIS, born in Suwon, South Korea. He is currently the youngest idol under HYBE Labels, but do not let that fool you.
He plays a big role in the group’s music video production, making him a key part of their “creator crew” identity.
He dropped out of middle school in 2021 to focus fully on his training with BIGHIT Music, a bold move that clearly paid off.
Fans have already started calling him the “5th Gen It Boy,” and his audition song was “Dynamite” by BTS.
Wrapping Up
Now that you know the CORTIS members and their individual stories, it is easy to see why this group has made such a strong impression in a short time.
Martin, James, Juhoon, Seonghyeon, and Keonho entered the industry with a clear sense of who they are.
And what they want to create.
Five young creators, each with a different background, coming together under one name to build something of their own.
Frequently Asked Questions (FAQs)
1. Did Any Cortis Members Know Each Other Before the Group Formed?
Some members crossed paths during their trainee years at Bighit Music, but the full five-member lineup was officially formed only ahead of their debut.
2. What is Cortis’s Second EP?
Cortis announced their second EP, called “greengreen,” set for release on May 4, 2026, with a pre-release single dropping on April 20, 2026.
3. Was Cortis Supposed to Have 6 Members?
Yes! There was heavy speculation that BigHit Music’s group, Cortis, was originally planned to have 6 members.
