Kim Sejeong
Jellyfish Entertainment

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Kim Sejeong is a South Korean singer and actress. She started her career as a member of the project group I.O.I, and released her debut solo album in 2020. She made her acting debut in the 2017 TV series School 2017.

Full NameKim Sejeong | 김세정 | 金世正
BornAugust 28, 1996
HometownMangyeong-eup, Gimje, Jeollabuk-do, South Korea
Height164cm | 5′-05″
Blood TypeAB
FamilyMother, Father, Older Brother, Dog
EducationHanyang Women’s University
Indeogwon High School
Hogye Middle School
Mangyeong Elementary School → Anyang Buheung Elementary School
FandomSESANG | 세상
Years Active2016 – present
Groupgugudan (2016 – 2020)
Sub-Unitgugudan SEMINA (2018 – 2020)
Project GroupI.O.I (2016 – 2017)
PositionMain Vocalist
LabelJellyfish Entertainment
Official Pageig


YearTypeAlbum Title
20212nd EPI’m
2020Digital SingleWhale
1st EPPlant

Show Details

Kim Sejeong Facts

  • She was born in Gimje and moved to Anyang when she was in 3rd grade.
  • She was in the Indeogwon High School Theatre club.
  • In 2012, she participated in Kpop Star 2.
  • In 2013, she participated in Superstar K5, but she had almost 0 screen time.
  • Around 3000 people auditioned for Jellyfish Entertainment and Sejeong passed it.
  • The song she chose for her audition was Let It Go by Idina Menzel.
  • She participated in Produce 101 after 1 year and 11 months of training, finished in 2nd place, and made her debut as a member of I.O.I in 2016.
  • She can play the guitar.
  • Hobbies: rewatching movies and TV series, writing poetry, snorkeling
  • Specialties: cooking, drawing
  • She had SMILE (SMall Incision Lenticule Extraction) eye surgery.
  • She was a fan of 2PM (bias: TAECYEON)
  • Her parents divorced when she was a kid and she was raised by her mom.
  • Nicknames: Sedong, God Sejeong


  • Animal: cats
  • Baseball Team: Hanwha Eagles


  • Mother
    She works in accounting.
  • Father
  • Older Brother
    Name: Kim Youngmin | 김영민
    Born: 1993
  • Kim Doenjang
    Breed: French Bulldog