.O.I (Hangul: 아이오아이; also known as IOI[1] or Ideal of Idol[2]) was a South Korean girl group formed by CJ E&M through the 2016 reality show Produce 101 on Mnet. The group was composed of eleven members chosen from a pool of 101 trainees from various entertainment companies: Lim Na-young, Kim Chung-ha, Kim Se-jeong, Jung Chae-yeon, Zhou Jieqiong, Kim So-hye, Yoo Yeon-jung, Choi Yoo-jung, Kang Mi-na, Kim Do-yeon and Jeon So-mi. They debuted on May 4, 2016 with the EP Chrysalis and actively promoted as a whole and as a sub-unit for less than a year. The group's concert titled Time Slip – I.O.I, which was held on January 20 to 22, 2017, marked their last group activity on stage. They officially disbanded at the end of January 2017 and returned to their respective agencies.


Choi Yoo-jung

최유정 (D.O.B: Nov 12, 1999)

Jeon So-mi

전소미 (D.O.B: Mar 09, 2001)

Jung Chae-yeon

정채연 (D.O.B: Dec 01, 1997)

Kang Mi-na

강미나 (D.O.B: Dec 04, 1999)

Kim Chung-ha

김청하 (D.O.B: Feb 09, 1996)

Kim Do-yeon

김도연 (D.O.B: Dec 04, 1999)

Kim So-hye

김소혜 (D.O.B: Jul 19, 1999)

Lim Na-young

임나영 (D.O.B: Dec 08, 1995)

Yoo Yeon-jung

유연정 (D.O.B: Aug 03, 1999)

Zhou Jieqiong

주결경 (D.O.B: Dec 16, 1998)


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