Kim Se Jeong

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Kim Se Jeong - Biography, Profile, Facts, and Career

Kim Se Jeong started her career when she decided to join K-Pop Star 2, a vocal competition, in 2012 at her 16 years old.

Unfortunately, she didn’t pass the second round audition, so she was eliminated from that show.

Three years later, in 2015, this Virgo Korean celebrity then joined Jellyfish Entertainment as her agency and began her training there.

In 2016, she, alongside Mina and Nayoung, joined Produce 101 as a representative contestant from Jellyfish.

After receiving a lot of support and achievements there, Kim Se Jeong finally made her debut with the winning group, IOI, alongside Mina, on May 4, 2016, by releasing Dream Girls.

But unfortunately, she didn’t take the IOI’s unit promotion at that time.

Instead, she did a promotion with her agency by debuting as a member of Gugudan on June 28, 2016, and released a single Wonderland.

IOI disbanded in 2017 and the members went back to their agencies to continue their careers, meanwhile, Sejeong kept establishing her solo career and Gugudan promotion.

During that year, Sejeong made a release of her single, If Only, as an OST of The Legend of the Blue Sea. She also released I Like You, I Don’t feature Block B’s Lee Tae Il.

Sejeong also gained her popularity in that year, by starring a drama School 2017 alongside Kim Jung Hyun and took a participation in the Law of the Jungle in Sumatra.

In 2018, she continued to release another OST single of hers, Lover, an OST of Mr. Sunshine.

That career then was followed by her appearing as the main actress for I Wanna Hear Your Song in 2019, where she won the 2019 KBS Drama Awards for that role.

Sejeong continued to star in the drama The Uncanny Counter in 2020 as Do Hana, a drama that was inspired by webtoon.

In that year, her group, Gugudan, also disbanded, but Sejeong kept renewing her contract with Jellyfish in 2021 as an actress and soloist.

And finally, in 2022, she comes back again to star in another Korean drama, Business Proposal, alongside popular actor Ahn Hyo Seop.

Read also: Kim So Jin – Biography, Profile, Facts, Family & Life Story


  • Real Name: Kim Se Jeong (김세정)
  • Stage Name: Sejeong (세정)
  • Nickname: Sejeong, God Sejong
  • Birthday: August 28, 1996
  • Birthplace: Gimje, North Jeolla, South Korea
  • Zodiac Sign: Virgo
  • Nationality: South Korean
  • Height: 164 cm (5’5″)
  • Weight: 48 kg (105 lbs)
  • Blood Type: AB
  • Religion: –
  • Profession: Actress, Singer
  • Education: Hanyang Women’s University (majored in Practical Music)
  • Hobbies: Painting, Re-watching movies
  • Parents: –
  • Siblings: 1 brother
  • Boyfriend: –
  • Facebook: –
  • Twitter: –
  • Instagram: @clean_0828
  • TikTok: –


  • Sejeong’s nickname, God Sejong, was given during her presence in Produce 101 because, in that show, she always got 1st or 2nd place.
  • She had become a trainee just 1 year before she joined Produce 101.
  • Sejeong once wrote a letter that express her guilty feeling for her mother because of their poor financial condition.
  • In that letter, Sejeong also asked her mother to wait until she could handle their family’s financial struggles.
  • Sejeong is so good at imitating expressions of cartoon characters.
  • IU is Sejeong’s role model.
  • She once got 1st place during a writing competition when she was 18 years old.
  • Sejeong is labeled as a Korean soloist who got the fastest win in a music show because of her song, Flower Road.
  • She made a good friendship with Wendy from Red Velvet and Naeun from APRIL.
  • Sejeong is also close with Jiyeon from T-ara and Spica from Jiwon.
  • Her ideal type is a mature man even though he’s at an early age.
  • Her net worth is around $4 million.

Read also: Min Do Hee – Biography, Profile, Facts, Family & Life Story

Drama Series

  • The Uncanny Counter 2 (OCN | 2022) as Do Ha Na
  • Today’s Webtoon (SBS | 2022) as On Ma Eum
  • Business Proposal (SBS | 2022), as Shin Ha Ri
  • The Uncanny Counter (OCN | 2020-2021), as Do Ha Na
  • I Wanna Hear Your Song (KBS2 | 2019), as Hong Yi Young
  • School 2017 (KBS2 | 2017), as Ra Eun Ho
  • The Sound of Your Heart (Naver TV | 2016-2017), as newlywed wife (cameo)


  • Warning (2021) – ft. Lil Boi
  • Baby I Love U (2021)
  • Plant (2020)
  • Whale (2020)
  • All of My Days (2020) – Crash Landing On You OST
  • What My Heart Says (2020) – Record of Youth OST
  • Meet Again (2020) – The Uncanny Counter OST 
  • Tunnel (2019)
  • We, the Reds (2018) – with VIXX’s Leo
  • Lover (2018)
  • I Like You, I Don’t (2017) – with Block B’s Lee Tae Il
  • If Only (2017) – The Legend of the Blue Sea OST
  • Flower Road (2016)

TV Shows

  • The Uncanny Return (tvN/OCN | 2021), as cast member
  • Immortal Songs 2 (KBS2 | 2020), as contestant
  • King of Mask Singer (MBC | 2019), as contestant “Eliza”
  • Happy Together (KBS2 | 2018-2019), as special host
  • Big Picture Family (SBS | 2018), as cast member
  • Salty Tour (tvN | 2018), as cast member
  • Galileo: Awakened Universe (tvN | 2018), as cast member
  • Baek Jong-won’s Alley Restaurant (SBS | 2018), as special co-host
  • Fantastic Duo (SBS | 2017), as contestant
  • Boat Horn Clenched Fists (SBS | 2017), as cast member
  • Law of the Jungle in Sumatra (SBS | 2017), as cast member
  • Battle Trip (KBS2 | 2017), as contestant and special host
  • Singing Battle (KBS2 | 2017), as contestant
  • Get It Beauty (OnStyle | 2017), as regular host
  • King of Mask Singer (MBC | 2017), as contestant “Worker Holic Antgirl”
  • 1 vs 100 (KBS2 | 2017), as contestant
  • Immortal Songs 2 (KBS2 | 2016), as contestant
  • Boom Shakalaka (KBS2 | 2016), as contestant
  • Talents For Sale (KBS2 | 2016), as regular host
  • Produce 101 (Mnet | 2016), as contestant
  • K-Pop Star 2 (SBS | 2012-2013), as contestant


  • KBS Drama Awards 2019 – K-Drama Hallyu Star (I Wanna Hear Your Song ) – Won
  • Baeksang Arts Awards 2018 – Best New Actress-Television (School 2017) – Nominated
  • KBS Drama Awards 2017 – Best New Actress (School 2017) – Won
  • Korea Drama Awards 2017 – Best New Actress (School 2017) – Nominated)\
  • SBS Entertainment Awards 2017 – Best Challenge Award (Law of the Jungle in Sumatra ) – Won
  • The Seoul Awards 2017 – Best Popular Actress (School 2017) – Won

As an entertainer, Kim Se Jeong always does her best to be the best Korean performer in the industry.

She never gives up to reach her dream and that’s why her fans love and support her so much.


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