아이오아이
I.O.I
Members
9
The eleven-month supergroup Produce 101 built — and the blueprint every survival show copied after.
- Survival-show born
- Bright pop
- Short by design
- Supergroup
- Nostalgia
LINEUP
Members
| Member | Position | Birthday | Age |
|---|---|---|---|
| Nayoung | Leader | Dec 18, 1995 | 30 |
| Chungha | Main dancer · Lead vocalist | Feb 9, 1996 | 30 |
| Sejeong | Main vocalist | Aug 28, 1996 | 30 |
| Chaeyeon | Vocalist · Visual | Dec 1, 1997 | 28 |
| Kyulkyung | Lead dancer · Vocalist | Dec 16, 1998 | 27 |
| Sohye | Vocalist · Rapper | Jul 19, 1999 | 27 |
| Yeonjung | Main vocalist | Aug 3, 1999 | 27 |
| Yoojung | Lead rapper · Lead dancer | Nov 12, 1999 | 27 |
| Mina | Lead dancer · Vocalist | Dec 4, 1999 | 26 |
| Doyeon | Vocalist · Visual | Dec 4, 1999 | 26 |
| Jeon Somi | Center · Lead dancer | Mar 9, 2001 | 25 |
MILESTONES
Records & firsts
First girl group assembled by public vote on Produce 101
Eleven members chosen from 101 trainees across competing agencies in 2016.
First full-group music-show win with "Very Very Very"
The October 2016 single, written by Park Jin-young.
A farewell single that won on its way out
"Downpour" took a music-show trophy weeks before the January 2017 disbandment.
Members went on to five further groups
Pristin, Gugudan, WJSN, DIA and Weki Meki all drew from the lineup.
DID YOU KNOW
Trivia & lore
The group was built to expire: the project contract ran eleven months, and it ended on schedule in January 2017.
The farewell single "Downpour" was written and co-produced by Seventeen's Woozi.
"Very Very Very" was written by Park Jin-young, the founder of JYP Entertainment — a rival agency to most of the members' own.
The members' last television appearance together was on MBC's "Section TV", and the official fan cafe closed on January 31, 2017.
The 2026 pre-release single "Goodbye with a Smile" was produced by B1A4's Jinyoung and recorded back in 2016.
DISCOGRAPHY
Signature tracks
TIMELINE
The journey
ORIGIN
Produce 101
2016 — 2016
Mnet put 101 trainees from competing agencies into one show and let viewers vote eleven of them into a group. It was the first time a Korean girl group had been assembled that way in public, and the format it established went on to define the next decade of survival programmes.
DEBUT
Chrysalis
2016 — 2016
The group debuted on May 4, 2016 with the EP "Chrysalis" and the single "Dream Girls", promoting under YMC Entertainment while every member remained contracted to her own agency.
Anchor track: Dream Girls
Very Very Very
2016 — 2016
The October single, written by JYP founder Park Jin-young, gave the full eleven-member lineup its first music-show trophy and became the song the group is still best remembered for.
Anchor track: Very Very Very
DISBANDMENT
Downpour
2016 — 2017
YMC confirmed in November 2016 that the project would end on schedule. The farewell single "Downpour", written and co-produced by Seventeen's Woozi, took a final music-show win, and the group disbanded on January 29, 2017 — eleven months after debut.
Anchor track: Downpour
RETURN
Loop
2019
A planned 2019 comeback collapsed amid the Produce vote-rigging investigation, and a 2021 livestream marked the fifth anniversary. For the tenth, nine members returned under Swing Entertainment with the EP I.O.I: Loop in May 2026 and an Asia tour through Seoul, Bangkok and Hong Kong.
Anchor track: Suddenly
FAQ
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INTERNAL LINKS
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Cover photo: Michael Duangdara · CC BY-SA 3.0