Introduction

I.O.I was a project girl group formed through Mnet's survival reality show Produce 101. Originally an eleven-member girl group, they debuted on May 4, 2016, with the mini album "Chrysalis". The group promoted for a year before disbanding on January 29, 2017.

In November 2015, Mnet announced their new survival show that would bring together 101 trainees from 46 entertainment companies to form a unit girl group with 11 members chosen by the viewers, which was called Produce 101. The show premiered on January 21, 2016, and the live finale was broadcast on April 1, 2016, with the 11 winners becoming a girl group.

The group's debut line included Zhou Jie Qiong and Lim Na Young both from Pledis Entertainment and the group PRISTIN, Kim Chung Ha from MNH Entertainment, Kim Se Jeong and Kang Mi Na both from Jellyfish Entertainment and the group gugudan, Choi Yoo Jung and Kim Do Yeon both from Fantagio Music and the group Weki Meki, Yoo Yeon Jung from Starship Entertainment and the group WJSN, Kim So Hye from Redline Entertainment, Jung Chae Yeon from MBK Entertainment and the group DIA, and Jeon So Mi from The Black Label.

Supposedly, the day of the show's finale was when I.O.I was supposed to debut with "Crush" and begin activities, but Mnet and YMC Entertainment decided to postpone their debut so they could prepare the group with their concept and a new song with new choreography. On April 5, 2016, the song was released as a digital single, followed by its music video.

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 from 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.

The group was planning to have a reunion in December 2019 with nine members under Studio Blu but due to four members being unable to participate, the reunion was virtually cancelled.

On May 4, 2021, the 5th anniversary of the group's debut, the group (except for Mina and Jieqiong) held a reunion livestream. Jieqiong managed to join the live stream via video calling.

Current state:

disbanded 

Studio Blu:

Jul 1, 2019-Oct 29, 2019

YMC Entertainment:

May 4, 2016-Jan 29, 2017

CJ E&M Music:

May 4, 2016-Jan 29, 2017

Debut:

May 4, 2016

Debut to 1st win:

104 days

Active years:

2016-2017

Country:

South Korea

Most popular member:

Jeon Somi

kpopping rank:

96th

Member's profiles

See pics for more Nayoung

Nayoung

Korean: 나영

Japanese: ナヨン

Birthday:

Dec 18, 1995

Age:

28 years old

Birthplace:

Gwanak-gu, Seou     South Korea

Height:

5'7" (171 cm)

Weight:

110.2 lbs (50 kg)

Zodiac-sign:

Sagittarius

Blood type:

0

Position:

Leader, Main Rapper, Lead Dancer, Vocalist

See pics for more Chungha

Chungha

Korean: 청하

Japanese: チョンハ

Birthday:

Feb 9, 1996

Age:

28 years old

Birthplace:

Ulsan     South Korea

Height:

5'4" (161 cm)

Weight:

97 lbs (44 kg)

Zodiac-sign:

Aquarius

Blood type:

A

MBTI:

ISFJ

Position:

Main Dancer, Lead Vocalist, Rapper

See pics for more Sejeong

Sejeong

Korean: 세정

Japanese: セジョン

Birthday:

Aug 28, 1996

Age:

28 years old

Birthplace:

Gimje     South Korea

Height:

5'5" (164 cm)

Weight:

105.8 lbs (48 kg)

Zodiac-sign:

Virgo

Blood type:

AB

Position:

Main Vocalist

See pics for more Chaeyeon

Chaeyeon

Korean: 채연

Japanese: チェヨン

Birthday:

Dec 1, 1997

Age:

26 years old

Birthplace:

Suncheon     South Korea

Height:

5'6" (166 cm)

Weight:

108 lbs (49 kg)

Zodiac-sign:

Sagittarius

Blood type:

A

Position:

Vocalist, Visual

See pics for more Zhou Jie Qiong

Zhou Jie Qiong

Korean: 결경

Japanese: ギョルギョン

Birthday:

Dec 16, 1998

Age:

25 years old

Birthplace:

Taizhou, Zhejiang, Shanghai     China

Height:

5'5" (165 cm)

Weight:

103.6 lbs (47 kg)

Zodiac-sign:

Sagittarius

Blood type:

0

Position:

Lead Dancer, Vocalist, Visual

See pics for more Sohye

Sohye

Korean: 소혜

Japanese: ソエ

Birthday:

Jul 19, 1999

Age:

25 years old

Birthplace:

Seoul     South Korea

Height:

5'4" (163 cm)

Weight:

105.8 lbs (48 kg)

Zodiac-sign:

Cancer

Blood type:

A

Position:

Vocalist, Rapper

See pics for more Yeonjung

Yeonjung

Korean: 연정

Japanese: ヨンジョン

Birthday:

Aug 3, 1999

Age:

25 years old

Birthplace:

Gwangmyung, Gyeonggi Province     South Korea

Height:

5'6" (167 cm)

Weight:

114.6 lbs (52 kg)

Zodiac-sign:

Leo

Blood type:

A

MBTI:

ESTP

Position:

Main Vocalist

See pics for more Yoojung

Yoojung

Korean: 유정

Japanese: ユージュング

Birthday:

Nov 12, 1999

Age:

24 years old

Birthplace:

Guri, Gyeonggi     South Korea

Height:

5'2" (157 cm)

Weight:

97 lbs (44 kg)

Zodiac-sign:

Scorpio

Blood type:

0

MBTI:

ISFJ

Position:

Lead Vocalist, Lead Rapper, Lead Dancer

See pics for more Mina

Mina

Korean: 미나

Japanese: ミナ

Birthday:

Dec 4, 1999

Age:

24 years old

Birthplace:

Icheon     South Korea

Height:

5'5" (164 cm)

Weight:

105.8 lbs (48 kg)

Zodiac-sign:

Sagittarius

Blood type:

0

Position:

Lead Dancer, Rapper, Vocalist

See pics for more Doyeon

Doyeon

Korean: 도연

Japanese: ドヨン

Birthday:

Dec 4, 1999

Age:

24 years old

Birthplace:

Gangwon     South Korea

Height:

5'8" (173 cm)

Weight:

110.2 lbs (50 kg)

Zodiac-sign:

Sagittarius

Blood type:

0

MBTI:

ISTP-A

Position:

Vocalist, Visual

See pics for more Jeon Somi

Jeon Somi

Korean: 전소미

Japanese: ソミ

Birthday:

Mar 9, 2001

Age:

23 years old

Birthplace:

Ontario     Canada

Height:

5'8" (172 cm)

Weight:

103.6 lbs (47 kg)

Zodiac-sign:

Pisces

Blood type:

0

MBTI:

ENFP

Position:

Lead Vocalist, Lead Dancer, Rapper, Center, Face of the Group, Maknae