CORTIS is one of the newer names to attract attention in the K-pop world. The five-member boy group comes from BIGHIT MUSIC, the company behind global acts such as BTS and TOMORROW X TOGETHER. CORTIS officially debuted in August 2025 with “What You Want,” introducing a young lineup and a creative style built around music, performance, visuals, and individuality.
For fans searching for CORTIS Ages, the group currently has members ranging from 17 to 20 years old as of September 14, 2026. JAMES is the oldest member, while KEONHO is the youngest. JUHOON and MARTIN are both 18, while SEONGHYEON is 17. Their relatively young ages are especially interesting because the members were already deeply involved in the group’s creative work around the time of their debut.
CORTIS Ages at a Glance
CORTIS has five members: MARTIN, JAMES, JUHOON, SEONGHYEON, and KEONHO. Based on their publicly reported birth dates, JAMES was born on October 14, 2005, JUHOON on January 3, 2008, MARTIN on March 20, 2008, SEONGHYEON on January 13, 2009, and KEONHO on February 14, 2009.
As of September 14, 2026, that makes JAMES 20, JUHOON 18, MARTIN 18, SEONGHYEON 17, and KEONHO 17. These are international-style ages based on whether each member has already celebrated their birthday in 2026. The ages will naturally change throughout the year, so a specific reference date is important when discussing CORTIS Members Ages.
Quick Bio Information
| Member | Birthday | Age on September 14, 2026 | Group Information |
|---|---|---|---|
| JAMES | October 14, 2005 | 20 | Oldest Member |
| JUHOON | January 3, 2008 | 18 | Member and Creative Contributor |
| MARTIN | March 20, 2008 | 18 | Leader |
| SEONGHYEON | January 13, 2009 | 17 | Member and Creative Contributor |
| KEONHO | February 14, 2009 | 17 | Youngest Member |
| Group | 2025 | — | CORTIS |
| Agency | — | — | BIGHIT MUSIC |
| Members | — | — | Five |
| Origin | — | — | South Korea |
| Genre | — | — | K-pop / Pop |
| Official Debut | August 18, 2025 | — | “What You Want” |
| Debut EP | September 8, 2025 | — | COLOR OUTSIDE THE LINES |
| Group Name Meaning | — | — | “Color Outside The Lines” |
| Debut Single | August 18, 2025 | — | “What You Want” |
| Pre-Debut Track | August 11, 2025 | — | “GO!” |
| Oldest Member | — | — | JAMES |
| Youngest Member | — | — | KEONHO |
Who Are the CORTIS Members?
CORTIS is made up of five members whose individual strengths contribute to the group’s overall identity. The lineup consists of MARTIN, JAMES, JUHOON, SEONGHYEON, and KEONHO. BIGHIT MUSIC has presented them as a young creator crew rather than simply a group of performers, emphasizing their direct involvement in music, choreography, and video production.
That creative approach makes the CORTIS age discussion especially interesting. Although the members are young, they were already working seriously on music and performance before their official debut. The group spent considerable time developing material, and the members have described collaboration as an important part of how they create. Their ages therefore tell only part of the story; their level of involvement in the creative process is just as important.
MARTIN Age, Birthday, and Profile
MARTIN was born on March 20, 2008, which makes him 18 years old as of September 14, 2026. He is the leader of CORTIS, although he isn’t the oldest member. That distinction belongs to JAMES. MARTIN’s leadership is therefore an interesting part of the group’s structure because he leads a team that includes an older member as well as younger members.
MARTIN has also been associated with the group’s songwriting and production work. Yonhap reported that he and JAMES had contributed to songs and choreography for other HYBE artists before CORTIS debuted. MARTIN explained that producing was something he enjoyed, while performing had also been a long-standing dream. His role helps show why CORTIS has been promoted as a creator-focused group rather than a conventional performance-only act.
JAMES Age, Birthday, and Profile
JAMES is the oldest member of CORTIS. He was born on October 14, 2005, and is 20 years old as of September 14, 2026. Because his 21st birthday has not yet arrived, he remains 20 at the current reference date. Published CORTIS member profiles consistently place him first in the group’s age order.
His experience also extends beyond simply being the oldest member. JAMES has contributed to choreography and had worked with other HYBE artists before CORTIS officially debuted. Yonhap reported that both JAMES and MARTIN had previous creative contributions involving groups such as ILLIT and TXT. Within CORTIS, JAMES continues to be part of the group’s performance and creative development.
JUHOON Age, Birthday, and Profile
JUHOON was born on January 3, 2008, making him 18 years old as of September 14, 2026. He is slightly older than MARTIN, even though MARTIN holds the group’s leadership role. That makes JUHOON an interesting part of the CORTIS age lineup because the leadership position isn’t simply assigned according to birth order.
JUHOON has also spoken about the meaning behind CORTIS and the group’s creative philosophy. During the group’s debut showcase, he explained that the name was created by selecting six letters from “Color Outside The Lines.” He connected the phrase with thinking freely beyond the standards and rules established by society. That idea has become a central part of how CORTIS presents itself to audiences.
SEONGHYEON Age, Birthday, and Profile
SEONGHYEON was born on January 13, 2009, so he is 17 years old as of September 14, 2026. He belongs to the younger half of the group and is only a little more than a year younger than MARTIN. His age also places him among the members who were still teenagers when CORTIS made its official debut in 2025.
SEONGHYEON has been particularly involved in the group’s collaborative creative process. Yonhap reported that the members initially worked separately but eventually found that closer collaboration produced better results. SEONGHYEON described the process as putting their heads together, even working together on individual lines of lyrics. This team-centered approach is an important part of CORTIS’s identity.
KEONHO Age, Birthday, and Profile
KEONHO was born on February 14, 2009, making him 17 years old as of September 14, 2026. He is the youngest member, commonly described as the group’s maknae. His birthday falls just over a month after SEONGHYEON’s, making the two members the closest in age within the five-member lineup.
KEONHO has also played an important role in CORTIS’s creative development. He discussed the group’s songwriting camp in Los Angeles, explaining that the members originally expected to work there for about a month but eventually spent around three months creating music. That experience helped shape the material that became part of the group’s debut project.
Who Is the Oldest CORTIS Member?
JAMES is the oldest CORTIS member. His October 14, 2005 birthday places him more than two years ahead of JUHOON, the next-oldest member. He is 20 years old on September 14, 2026 and will turn 21 in October.
The age difference doesn’t prevent the group from working collaboratively. In fact, CORTIS has repeatedly emphasized teamwork and shared creative responsibility. The group’s age order is therefore useful information for fans, but it doesn’t necessarily determine who contributes the most creatively or who takes the most prominent role in a particular song or performance.
Who Is the Youngest CORTIS Member?
KEONHO is the youngest CORTIS member. Born on February 14, 2009, he is 17 years old as of September 14, 2026. He is only about a month younger than SEONGHYEON, who was born on January 13, 2009.
KEONHO was still a teenager when CORTIS officially entered the K-pop scene, but his participation in the group’s creative process shows that age doesn’t tell the whole story. His comments about the Los Angeles songwriting camp also demonstrate how closely the younger members were involved in preparing the group’s debut music.
CORTIS Members’ Birthdays and Age Differences
The CORTIS birthdays create a fairly clear age pattern. JAMES is the only member born in 2005. JUHOON and MARTIN were both born in 2008, although JUHOON’s January birthday comes before MARTIN’s March birthday. SEONGHYEON and KEONHO were both born in 2009, with SEONGHYEON arriving first in January and KEONHO following in February.
This means the five members currently span three birth years and a little over three years from oldest to youngest. At debut, however, all five members were teenagers. Their young age was part of the group’s fresh image, while their substantial creative involvement gave the debut a more mature artistic foundation.
How Old Were CORTIS Members When They Debuted?
CORTIS officially debuted on August 18, 2025, when the members were between 16 and 19 years old. JAMES was 19, JUHOON was 17, MARTIN was 17, SEONGHYEON was 16, and KEONHO was 16 at the time. The debut came with the release of “What You Want,” which was also the lead single from the group’s first EP, COLOR OUTSIDE THE LINES.
The debut itself followed several months of preparation and creative development. BIGHIT MUSIC had announced the group’s name on August 7, 2025, while “GO!” arrived shortly before the official debut. The timeline shows how quickly CORTIS moved from its public introduction to its formal arrival as a recording act.
What Does the Name CORTIS Mean?
The name CORTIS comes from “Color Outside The Lines.” According to JUHOON, the name was created by irregularly selecting six letters from that phrase. More importantly, the words represent the group’s desire to think freely and move beyond conventional rules and expectations.
That concept connects naturally with the way CORTIS works. The members aren’t presented only as singers and dancers. BIGHIT MUSIC describes them as a young creator crew involved in music, choreography, and videos. Their name therefore works as a statement about their creative attitude as much as it does as a group identity.
CORTIS Under BIGHIT MUSIC
CORTIS is managed by BIGHIT MUSIC, the HYBE label associated with BTS and TOMORROW X TOGETHER. Their debut was particularly notable because they became BIGHIT MUSIC’s first new boy group in six years following TXT’s 2019 debut.
The connection to BIGHIT MUSIC naturally created considerable attention before CORTIS had even released its first official single. However, the members have been clear that they want to establish an identity of their own. Their goal, as JUHOON explained during the debut showcase, was for listeners to eventually hear something and immediately think, “That’s so CORTIS.”
CORTIS’ Music and Creative Identity
CORTIS’s debut music reflects the group’s interest in combining different sounds rather than staying inside one narrow genre. “What You Want” combines a 1960s psychedelic-rock guitar sound with a hip-hop boom-bap rhythm. The group released the song on August 18, 2025, ahead of the September 8 release of COLOR OUTSIDE THE LINES.
The debut EP expanded that approach. BIGHIT MUSIC’s official material describes “FaSHioN” as combining trap and southern hip-hop, “JoyRide” as blending alternative rock with pop, and “Lullaby” as a psychedelic soul track with experimental guitar sounds. The members were involved in the writing and composition of several tracks, reinforcing the idea that their creativity extends beyond the stage.
CORTIS’ Early Journey and What Makes the Group Different
One of the most interesting parts of CORTIS’s early story is how much work went into finding its sound. Yonhap reported that the members considered more than 300 songs while preparing their debut material. They also attended a songwriting camp in Los Angeles that lasted around three months rather than the originally planned one month.
Their visual work has also been unusually hands-on. An original version of the “What You Want” music video was directed, filmed, and edited by CORTIS members themselves, according to Soompi’s report. The group even developed distinctive treadmill choreography for the song after practicing live performance while running on treadmills. These details help explain why CORTIS has attracted attention beyond its members’ young ages.
Final Thoughts on CORTIS Ages
The current CORTIS Ages show a young group with a 17-to-20 age range. JAMES is the oldest at 20, JUHOON and MARTIN are 18, while SEONGHYEON and KEONHO are 17 as of September 14, 2026. Yet their ages are only one part of what makes this group interesting.
From the beginning, CORTIS has emphasized creativity and collaboration. The members have worked on songwriting, production, choreography, and visual projects, while their debut EP demonstrated a willingness to move between hip-hop, rock, pop, trap, and psychedelic sounds.
For fans discovering the group in 2026, knowing the CORTIS Members Ages and Birthdays offers a helpful starting point. But the bigger story is how these young artists are building an identity of their own. Their name, Color Outside The Lines, captures that ambition well: CORTIS wants to create its own path rather than simply follow an established one.
FAQs About CORTIS Ages
How Old Are the CORTIS Members?
As of September 14, 2026, JAMES is 20, JUHOON is 18, MARTIN is 18, SEONGHYEON is 17, and KEONHO is 17. Their ages are based on their reported birthdays and international age calculations.
Who Is the Oldest CORTIS Member?
JAMES is the oldest member of CORTIS. He was born on October 14, 2005, and is currently 20 years old. He will turn 21 on October 14, 2026.
Who Is the Youngest CORTIS Member?
KEONHO is the youngest member, or maknae, of CORTIS. He was born on February 14, 2009, and is 17 years old as of September 14, 2026.
When Did CORTIS Debut?
CORTIS officially debuted on August 18, 2025, with the release of “What You Want.” The song served as the lead single for the group’s first EP, COLOR OUTSIDE THE LINES, which was released on September 8, 2025.
Who Are the Members of CORTIS?
The five CORTIS members are MARTIN, JAMES, JUHOON, SEONGHYEON, and KEONHO. BIGHIT MUSIC introduced the group as a young creator crew with direct involvement in music, choreography, and video production.
What Does CORTIS Stand For?
CORTIS is derived from “Color Outside The Lines.” The name reflects the group’s idea of thinking beyond established rules and expressing individuality.
Which Company Manages CORTIS?
CORTIS is under BIGHIT MUSIC, the HYBE label associated with BTS and TOMORROW X TOGETHER. The group became BIGHIT MUSIC’s first new boy group since TXT’s debut in 2019.
What Is CORTIS’ Debut Song?
CORTIS debuted with “What You Want” on August 18, 2025. The track combines psychedelic-rock guitar with hip-hop boom-bap rhythms and introduces the group’s confident, genre-mixing musical style.
Learn more and explore exciting content on: Omar Camacho: Age, Career, Songs, Family, and Life Story
Leave a Reply