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I.O.ILead RapperLead DancerLead Vocalist

Yoojung

유정Choi Yoo-jung (최유정)

Produce 101’s Pick Me centre, I.O.I rapper and dancer, Weki Meki member and the solo artist behind Sunflower.

Yoojung of I.O.I — official I.O.I: LOOP concept photograph, 2026
Source: I.O.I / Swing Entertainment
Age
26
Nov 12, 1999
Height
159 cm
5′3″
MBTI
ISFJ
self-reported
Debut
2016
with I.O.I

At a glance

Profile

Stage name
Yoojung (유정)
Birth name
Choi Yoo-jung (최유정)
Position
Lead Rapper, Lead Dancer, Lead Vocalist
Birthday
November 12, 1999 (age 26)
Zodiac sign
Scorpio
Chinese zodiac
Rabbit
Height
159 cm (5′3″)
Blood type
O
MBTI
ISFJ
Nationality
South Korean
Birthplace
Guri, South Korea
Nicknames
Wink Fairy, Yoodaeng
Joined
May 4, 2016

9 facts

About Yoojung

Yoojung introduced Produce 101 as the centre of Pick Me, finished third and contributed lyrics to I.O.I’s debut. She later joined Weki Meki and released her solo single album Sunflower in 2022. Following Weki Meki’s August 2024 disbandment, she renewed her Fantagio contract and continued solo screen and music work before I.O.I’s 2026 reunion.

  1. 01

    She trained at Fantagio for four years and seven months.

  2. 02

    She transferred to the School of Performing Arts Seoul alongside Doyeon.

  3. 03

    She and Nayoung co-wrote lyrics for Dream Girls and the Chrysalis intro.

  4. 04

    She took part in the seven-member Whatta Man unit.

  5. 05

    Her screen work includes Sound Candy and the film The Noisy Mansion.

  6. 06

    Weki Meki debuted with Weme in August 2017.

  7. 07

    She and Doyeon joined WJSN’s Seola and Luda in WJMK for Strong in 2018.

  8. 08

    Her first solo single album Sunflower was released on September 14, 2022.

  9. 09

    She featured on Jinjin’s Lazy from the Jinjin & Rocky EP Restore.

4 tracks

Solo & unit tracks

Songs on I.O.I releases that feature Yoojung as a solo artist or in a unit.

  1. “I Love You, I Remember You”

    Unit: Nayoung, Chungha, Kyulkyung, Sohye, Yoojung, Doyeon and Jeon Somi · Moon Lovers: Scarlet Heart Ryeo OST Part 3

    OST

  2. “꽃, 바람 그리고 너”

    Collaboration: Chungha, Yoojung and Jeon Somi with Huihyeon · Flower, Wind and You

    Collaboration

  3. “꽃, 바람 그리고 너 (Hidden Track)”

    Collaboration: Chungha, Yoojung and Jeon Somi with Huihyeon · Flower, Wind and You

    Collaboration

  4. “Whatta Man (Good man)”

    Unit: Nayoung, Chungha, Kyulkyung, Sohye, Yoojung, Doyeon and Jeon Somi · Whatta Man (Good Man)

    Single album

10 other members

Also in I.O.I

Full group profile