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CompanyN.CH Entertainment
Year Debut2020
Year Active2
Year DisbandedN/A

Profile Rank #80



TO1 (Korean: 티오오; acronym for "TOgether as ONE") is a 9-member South Korean kpop boy group under CJ ENM formed through Mnet’s 2019 survival show World Klass. The group debuted on April 1, 2020 with 10 members. There were several lineup changes after their debut. The current members of TO1 are: Donggeon, Chan, Jisu, Jaeyun, J.You, Kyoungho, Daigo, Renta, and Yeojeong.

TO1 was formerly known as TOO (Ten Oriented Orchestra). 

TO1 Member Ages

TO1 Age Ranking

Ranked from oldest to youngest.

1. DonggeonJul 15, 199922 years old
2. ChanDec 08, 199922 years old
3. JisuJan 19, 200022 years old
4. MinsuMar 20, 200022 years old
5. JaeyunAug 16, 200021 years old
6. J.YouNov 02, 200021 years old
7. KyunghoMay 07, 200121 years old
8. JeromeAug 25, 200120 years old
9. DaigoJan 21, 200220 years old
10. RentaFeb 16, 200319 years old

TO1 Member Heights

TO1 Height Ranking

Ranked from tallest to shortest.

1. Kyungho1.83 m (6'0")
2. Renta1.80 m (5'11")
3. Jerome1.80 m (5'11")
4. Donggeon1.80 m (5'11")
5. Jisu1.77 m (5'10")
6. Chan1.77 m (5'10")
7. Daigo1.73 m (5'8")
8. Jaeyun1.72 m (5'8")
9. Minsu1.71 m (5'7")
10. J.You1.71 m (5'7")

Members and Positions


TO1 is composed of 9 members born between 1999 and 2002. The current members of TO1 are:

The original 10 members included: Donggeon, Chan, Jisu, Minsu, Jaeyun, J.You, Kyungho, Chihoon, Jerome, Woonggi. They were the winners of the reality show World Klass.

Former member Chihoon left the group on Apr 30, 2022. Minsu, Woongi, Jeromi departed in June 2022. Daigo, Renta, and Yeojeong joined shortly after in July 2022.

The oldest member is Donggeon (born Jul 15, 1999). The youngest member (maknae) is Woonggi (born Apr 23, 2002).


  • Donggeon: vocalist
  • Chan: dance, rapper
  • Jisu: dancer, vocalist
  • Minsu: dancer, vocalist
  • Jaeyun: leader, main vocalist
  • J.You: rapper, visual
  • Kyungho: dancer, vocalist
  • Jerome: vocalist, visual
  • Woonggi: vocalist, maknae

Fun Facts and Trivia

  • The leader of TO1 is Jaeyun.
  • The oldest member of TO1 is Donggeon (born Jul 15, 1999).
  • The youngest member (maknae) of TO1 is Woonggi (born Apr 23, 2002).
  • The tallest member of TO1 is Jang Kyungho with a height of 183 cm (6'0'').
  • The shortest member of TO1 is Kim Minsu with a height of 171 cm (5'7'').
  • TO1 was formerly known as TOO (Ten Oriented Orchestra). The new name was announced on Mar 2021 following a dispute between the agencies managing the group.


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