Kim Se Jeong

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

Kim Se Jeong is a Korean actress and singer. She rose to prominence through joining Produce 101 in 2016 and being in the final lineup of show, as well as for being the former member of the girl groups, I.O.I and Gugudan.

She later shifted into a successful actress who has appeared in a number of drama series such as School 2017 (2017), The Uncanny Counter (2020–2023), and Business Proposal (2022).


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
  • Religion: –
  • Profession: Actress, Singer
  • Education: Hanyang Women’s University (majored in Practical Music)
  • Hobbies: Painting, Re-watching movies
  • Facebook: –
  • Twitter: –
  • Instagram: @clean_0828
  • TikTok: –

Height, Weight & Physical Appearance

  • Height: 164 cm (5’5″)
  • Weight: 48 kg (105 lbs)
  • Blood Type: AB
  • Hair color: Brown
  • Eye color: Brown
  • Body measurements: 32-24-33 (Bust -32, Waist -24, and Hips -33 inches)
  • Shoe size: 7 (US)
  • Dress Size: 5 (US)


  • Father: –
  • Mother: –
  • Brother: –
  • Sister: –

Boyfriend & Dating History

Sehun (EXO)

Since around the end of 2019, Se Jeong was linked romantically to Sehun, who’s her co-cast members in Busted! variety show. The rumors started as the duo showed good on-screen chemistry with each other.

That being said, Se Jeong personally refuted the dating rumors in early 2021. She clarified that they haven’t even contacted one another except for work-related matters.

Ahn Hyo Seop

Ahn Hyo Seop and Kim Se Jeong’s chemistry on their drama, Business Proposal (2022), apparently had fans thinking they were involved in a real-life romance.

The rumors started from fans, who thought the pair might be dating due to Ahn Hyo Seop’s now-deleted adorable Instagram post with her.

In addition, fans suspected they went to a Japan trip together in June 2022, as in one of his posted photos on Instagram, there’s a capture of a hand that’s reckoned to be Se Jeong’s.

However, Se Jeong herself personally debunked the rumors through a Weverse Live session, stating that he went to Japan with her friend, best friend, and older brother.

Net Worth

Sejong has an estimated net worth of $4 million to $7 million. She mainly earns her income from working as an actress and singer.


Kim Se Jeong donated ₩10 million to help the Uljin, Gyeongbuk’s massive wildfire’s victims through the Hope Bridge Disaster Relief Association in 2022.

In thesame month, she donated the same amount to help Ukraine’s war refugees through Fruit of Love, Community Chest of Korea.

Other donations she has made are ₩20 million to help floods victims in South Korea, ₩10 million for Typhoon Hinnamnor victims, and ₩40 million to help Turkey–Syria earthquake victims, which were all done through The Hope Bridge Korea Disaster Relief Association.

Plastic Surgery

There has been no proof that Sejeong did any surgery.


  • 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.

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


  • 2019 KBS Drama Awards – K-Drama Hallyu Star – I Wanna Hear Your Song
  • 2017 KBS Drama Awards – Best New Actress – School 2017
  • 2017 SBS Entertainment Awards – Best Challenge Award – Law of the Jungle in Sumatra
  • 2017 The Seoul Awards 2017 – Best Popular Actress – School 2017


“Before I became famous, I was more interested in comfort than style.”

“Now, I enjoy dressing up, and I have picked up quite a few tips from the excellent stylists I have worked with.”

“My favourite outfits still tend to be those that are comfortable to move around in while I’m going about my day. I’m thinking wide-leg pants and cargo pants and, for tops, oversized shirts, hoodies or loose knitwear.”

“I think that taking notes is a very important habit to develop, and I love writing things down. I always carry several notepads, each one for something different — one is a diary, one is for ideas, one is for studying scripts and characters, and so on.”

“I don’t know how things will change in the future, but ‘Business Proposal’ is definitely my all-time favorite drama so far. From storylines to the synergy between the actors and staff members, every experience was amazing.”

“I am grateful that many people want to know more about Kim Se-jeong after watching ‘Business Proposal.’ As I see fans are enjoying my music and previous television dramas, I became more determined to work hard to not be ashamed by my future,” the actor said.

“I have never played a role in a movie. Though they might look similar, I am certain that acting in the television drama and film are completely different. So I wish to challenge myself in a movie, especially in a musical film.”


Who is Kim Se Jeong?

She is a South Korean actress and singer. 

Who is Kim Se Jeong’s real name?

Her real name is Kim Se Jeong (김세정).

What makes Kim Se Jeong famous?

She’s famous through joining Produce 101 in 2016 and being in the final lineup of show, as well as for being the former member of the girl groups, I.O.I and Gugudan.

Where is Kim Se Jeong from?

She was born in Gimje, North Jeolla, South Korea.

How old is Kim Se Jeong?

She was born in 1996, and she is 27 years old as of 2023.

When Kim Se Jeong celebrates her birthday?

She celebrates on the 28th of every August.

How tall is Kim Se Jeong?

Her height is 5’5″ or 164 cm.

Who are Kim Se Jeong’s parents?

She did not reveal the names of her father and mother.

Is Kim Se Jeong married?

She is not married. Furthermore, there is no information on whether she is in a relationship or not.

Who is Kim Se Jeong’s ex-boyfriend?

None of her ex-boyfriend is known to the public. However, she used to be rumored to date Sehun (EXO) and Ahn Hyo Seop.

How rich is Kim Se Jeong?

Her net worth is around $4 million to $7 million.

What is Kim Se Jeong nationality?

Her nationality is South Korean.

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.


Your email address will not be published. Required fields are marked *