How old are the CORTIS members?

As of September 2026, James is 20, Juhoon and Martin are 18, and Seonghyeon and Keonho are 17.

The five

CORTIS Members

Q: Who is the leader of CORTIS?

Martin is the leader of CORTIS. Fans guessed it early because his name kept being listed first, and it was later confirmed on Weverse. He is also the tallest member.

Q: Who is the maknae of CORTIS?

Keonho is the maknae (youngest member) of CORTIS, born on 14 February 2009. Seonghyeon is only a month older, born on 13 January 2009.

Q: Who is the oldest member of CORTIS?

James is the oldest member of CORTIS, born on 14 October 2005. The next oldest is Juhoon (3 January 2008), then Martin (20 March 2008).

Q: Who is the visual of CORTIS?

CORTIS has no official visual. The group was never given the usual positions like main vocalist, main dancer, center or visual.

Q: What positions do the CORTIS members have?

Apart from Martin as leader, CORTIS members have no fixed positions. All five write, produce, work on choreography and help direct their videos.

Martin, James, Juhoon, Seonghyeon, Keonho • updated Sep 17, 2026

CORTIS is a five member group under BIGHIT MUSIC. The name is short for Color Outside the Lines, and they debuted on 18 August 2025.

Martin, James, Juhoon, Seonghyeon and Keonho. They write, produce, choreograph and sit in on the visual direction themselves, which is the whole reason this site exists. Pick a member below for the full profile: real name, birthday, position, how they got here and every fact worth knowing.

CORTIS members by age, oldest to youngest

James is the oldest by more than two years. Juhoon is older than Martin by eleven weeks, and Seonghyeon and Keonho were born a month apart in 2009.

Member	Born	Age
JamesOldestChao Yufan, also written Zhao Yufan	14 Oct 2005	20
JuhoonKim Juhoon	3 Jan 2008	18
MartinLeaderMartin Edwards, Korean name Park Woojoo	20 Mar 2008	18
SeonghyeonEom Seonghyeon, English name Sean	13 Jan 2009	17
KeonhoMaknaeAhn Keonho	14 Feb 2009	17

Ages update on their own. Birthdays and real names from the member profiles on Kprofiles, which also has the source for Martin’s leader confirmation.

Leader, maknae, oldest and visual

Who is the leader of CORTIS?

Martin is the leader. Fans guessed it early because his name kept being listed first, and it was later confirmed on Weverse. He is also the tallest member.

Who is the maknae of CORTIS?

Keonho, born on 14 February 2009. Seonghyeon is only a month older, born on 13 January 2009, so the two of them are the 2009 line.

Who is the oldest member of CORTIS?

James, born on 14 October 2005, more than two years older than anyone else. The next oldest is Juhoon, not Martin: the leader is only the third oldest.

Who is the visual of CORTIS?

There is no official visual. CORTIS were never given the usual positions like main vocalist, main dancer, center or visual. Fans have opinions, loudly, but none of it comes from the group.

What positions do the CORTIS members have?

Apart from Martin as leader, none are fixed. All five write, produce, work on choreography and help direct their videos, which is the whole idea of the group. Each profile says what that member does most.

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