1the9: Profile, Facts, Official Debut, and Most Recent News


Get to Know 1The9

In this article, Channel-Korea will provide you with a detailed rundown of everything you need to know about 1THE9. So, keep reading!

Yoo Yong-ha’s Profile and Facts


Name: Yongha (용하)

Stage Name: Yoo Yong-ha (유용하)

Date of Birth: January 11th, 1999

Position: Vocalist, Leader, Lead Rapper

Instagram: @you_haaaaa


  • Yongha auditioned for The Unit but he didn’t pass
  • He is under OUI Entertainment
  • He is the oldest member of the group
  • Yongha is part of Oui Boyz with stage name Youha
  • He was ranked 11th in fashion in Episode 13
  • “Rain” by IU is his favorite song
  • Jinsung and Seunghwan are his roommates
  • His favorite food is fried chicken
  • Yongha has a nickname, that is Young-ddaeng
  • He was in the same team with Song Byeonghee and Yoon Taekyung during the final live stage, but unfortunately, Taekyung got eliminated before the final live stage

Kim Tae-woo’s Profile and Facts


Name: Kim Tae-woo (김태우)

Stage Name: Taewoo (태우)

Date of Birth: April 23rd, 1999

Position: Rapper, Vocalist

Blood Type: O

Instagram: –


  • Taewoo has wanted to be an idol since he was a kid
  • A Team Entertainment is his agency
  • He was ranked 8th in fashion in Episode 13
  • Everybody says that he resembles Park Seo-joon
  • He admits that he is the cutest member and is good at doing aegyo
  • “Mom” by Ra.D is his favorite song
  • Although he was in the vocal team, the directors were impressed by his dancing skills
  • His hobby is playing baseball
  • Taewoo’s Chinese zodiac is the Rabbit
  • He likes Mosuel cake/pie

Lee Seung-hwan’s Profile and Facts


Name: Lee Seung-hwan (이승환)

Stage Name: Seunhwan (승환)

Date of Birth: May 20th, 2000

Position: Lead Vocalist, Lead Dancer

Blood Type: B

Instagram: –


  • He studied at Gangseo High School
  • He is under Kakao M
  • Seunghwan was a trainee for a year and three months
  • Before debuting with 1the9, he was part of Fave Boys along with Jinsung, Hyeongbin, Byeonghee, Doyum, and Jimin
  • He is so polite, and everyone admits it
  • He loves fashion, so much so that he got ranked 1st in fashion (in Episode 13)
  • Seunghwan likes BTS and also their songs: his lock-screen is BTS’ “DNA”
  • Besides being polite, he is also the epitome of patience
  • Lately, his favorite song is “Every Day Every Moment” by Paul Kim

Shin Ye-chan’s Profile and Facts


Name: Shin Ye-chan (신예찬)

Stage Name: Yechan (예찬)

Date of Birth: May 14th, 2001

Position: Lead Dancer, Main Vocalist

Blood Type: A

Instagram: –


  • Yechan can play the guitar
  • He is under TOP Media
  • His hobbies are playing football, watching movies, and playing guitar
  • Yechan was ranked 7th in fashion among 19 trainees (in Episode 13)
  • Chicken and pizza are his favorite foods
  • His height is 183 cm, and when he was in Under Nineteen he was the tallest contestant
  • In the group, he and Seunhwan are called the Sweet Boring Line
  • Classical Schooler is his nickname
  • When he was in Under 19 (Under Nineteen) he was called Boring-chan by the contestants

Kim Jun-seo’s Profile and Facts


Name: Kim Junseo (김준서)

Stage Name: Junseo (준서)

Date of Birth: November 20th, 2001

Birthplace: Ulsan, South Korea

Position: Visual, Rapper, Lead Vocalist, Lead Dancer

Blood Type: O

Instagram: @__k_junseo


  • He was the last member to be announced of joining 1the9 and he was ranked 9th in the last episode
  • Junseo is under OUI Entertainment
  • He has a younger brother named Kim Junhui
  • Not only in the group, but even as a contestant of Under 19, all the contestants called him the no 1 visual
  • He studied at Mugeo Middle & High School, and Shinbok Elementary School
  • He likes “Downpour” by I.O.I
  • He is good at taking pictures

Jeon Do-yum’s Profile and Facts


Name: Jeon Doyum (전도염)

Stage Name: Doyum (도염)

Date of Birth: February 21st, 2002

Position: Center, Vocalist, Main Dancer, Lead Rapper

Blood Type: B


  • Doyum is a former trainee of C9
  • He is under Kakao M
  • He really loves fantasy movies, and he said that he feels good when he watches fantasy movies
  • Doyum is a big fan of BTS. He said that he wanted to be a singer after he watched BTS’ “I Need U.” Not only that, but his phone’s lock-screen is a BTS photo
  • His favorite song is BTS’ song “Epilogue: Young Forever”
  • He is really passionate about all things, such as he wants to be on a reality show after debut
  • Galbitang is his favorite food, and he also likes fruits, coffee, winter, etc.

Jung Jin-sung’s Profile and Facts


Name: Jung Jinsung (정진성)

Stage Name: (Jinsung (진성)

Date of Birth: March 30th, 2002

Birthplace: Yeoncheon, Gyeonggi Province, South Korea

Position: Visual, Lead Dancer, Main Vocalist

Blood Type: B


  • He trained for two years and two months
  • Jinsung is under Kakao M
  • He is a big fan of BTS and his lock-screen is a picture of BTS
  • Jinsung, TXT’s Taehyung, and Beomgyu are close friends
  • His favorite songs are Chet Baker’s songs “But Nor For Me” and “Blue Moon”
  • Jinsung said that he’s the cutest, sexiest, and most playful member of 1the9
  • He wants a world tour concert after debut

Jeong Taek-hyeon’s Profile and Facts


Name: Jung Taekhyeon (정택현)

Stage Name: Taekhyeon (택현)

Date of Birth: July 28th, 2003

Position: Face of the group, Main Rapper, Vocalist

Blood Type: B

Instagram: @th728


  • Taekhyeon was born in Gunpo, South Korea
  • He is under Management Air
  • Before debut, he had appeared in several dramas and Korean movies such as Farewell (2013 – Movie), The Suffered (2014 – Movie), Forgotten (2017 – Movie), Dark Figure of Crime (2018 – Movie), Good Doctor (2013 – drama), Inspiring Generation (2014 – drama), The Three Musketeers (2014 – drama), etc.
  • Taekhyeon was the MC of Tooniverse’s shows Season 7, and also was the special MC on Under Nineteen (Ep. 10)
  • He has appeared on several advertisements such as Kumon

Park Sung-won’s Profile and Facts


Name: Park Sung-won (박성원)

Stage Name: Sungwon (성원)

Date of Birth: December 18th, 2003

Position: Maknae, Vocalist, Main Rapper

Blood Type: B

Instagram: @inmypurple_


  • He has two nicknames, namely Bunny and Big Eyes
  • He also introduced himself as bunny Sungwon on Weekly Idol
  • Sungwon is an idol under A Team Entertainment
  • His favorite song is “Jasmine” by DPR Live
  • He can write lyrics
  • Sungwon is called the “happy virus” by the band members and fans