Kim Se Jeong – Bio, Profile, Age, Boyfriend, Net Worth

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Kim Se Jeong is a Korean actress and singer. She became famous for joining Create 101 in 2016 and for being in the show’s final lineup, as well as being a former member of the girl groups IOI and Gugudan.

She later turned into a successful actress who has appeared in many drama serials School 2017 (2017), Uncanny Counter (2020-2023), and Business proposal (2022).


Kim Se Jeong started her career when she decided to join K-Pop Star 2A vocal competition, in 2012 at the age of 16.

Unfortunately, she did not pass the second round of auditions, so she was kicked out of the show.

Three years later, in 2015, the young Korean celebrity later joined Jellyfish Entertainment as her agency and began her training there.

In 2016, she joined Mina and Nayoung Create 101 As a representative competitor of jellyfish.

After a lot of support and success there, Kim Se Jeong finally debuted on May 4, 2016 with Mina, the winning group IOI. Dream Girls.

But unfortunately, she did not get promotion to IOI’s unit at that time.

Instead, she debuted as a member of Gugudan on June 28, 2016, promoted with her agency and released a single. Wonderland.

IOI disbanded in 2017 and the members returned to their agencies to continue their careers, meanwhile, Sejong established her solo career and Gugudan Promotions.

That year, Sejong released her single, If onlyAs T’s OSTThe Legend of the Blue Sea. She left too I like you, I don’t Feature Block B’s Lee Tae Il.

Sejong also gained her popularity by doing a drama that year School 2017 Participated with and in Kim Jung Hyun Forest Law in Sumatra.

In 2018, she continued to release another of her OST singles, boyfriendAn OST Mr. Sunshine.

After that career, she appeared as a lead actress I want to hear your song in 2019, where she won the 2019 KBS Drama Awards for the role.

Sejong continued to work in drama Uncanny Counter Do Hana in 2020, a drama inspired by a webtoon.

That year, her group, Gugudan, also disbanded, but Sejong renewed her contract with Jellyfish as an actress and solo artist in 2021.

And finally, in 2022, she returns to star in another Korean drama, business proposal, With a popular actor Ahn Hyo Seop.


  • Real Name: Kim Se Jeong (김세정)
  • Stage Name: Sejeong (세정)
  • Nickname: Sejeong, God Sejong
  • kim se jeong boyfriend Birthday: 28 August 1996
  • Birthplace: Gimje, North Jeolla, South Korea
  • Zodiac: Virgo
  • Nationality: South Korean
  • Religion:-
  • Occupation: Actress, Singer
  • Education: Hanyang Women’s University (Major in Applied Music)
  • Hobbies: Painting, watching movies again
  • Facebook:-
  • Twitter:-
  • kim se jeong Instagram : @clean_0828
  • TikTok:-
  • YouTube: Official Kimsejong

Height, weight and physical appearance

  • kim se jeong Height: 164 cm (5’5″)
  • kim se jeong Weight: 48 kg (105 lb)
  • Blood type: AB
  • Hair Color: Brown
  • Eye Color: Brown
  • kim se jeong Measurements: 32-24-33 (Bust-32, Waist-24, and Hips-33 inches)
  • Shoe Size: 7 (US)
  • Dress Size: 5 (US)

the family

  • Father:-
  • Mother:-
  • Brother:-
  • Sister:-

Boyfriend and dating history

Sehun (EXO)

In late 2019, Se Jeong was romantically linked to Sehun, her co-cast member. Smash! variety show. Rumors started as the duo showed great on-screen chemistry with each other.

That being said, Se Jeong personally denied dating rumors in early 2021. She explained that they didn’t even contact each other except for work-related matters.

Ahn Hyo Seop

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

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

In addition, fans suspect that they went on a trip to Japan together in June 2022, as in one of the photos posted on his Instagram, he is holding a hand that is believed to be Se Jeong’s.

However, Se Jeong himself denied the rumors through a Weverse Live session, saying that he went to Japan with her friend, best friend and older brother.

kim se jeong Net worth

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


Kim Se Jeong donated ₩10 million through the Hope Bridge Disaster Relief Association in 2022 to help victims of the large-scale wildfires in Uljin, Gyeongbuk.

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

Other donations she made were ₩20 million to help flood victims in South Korea, ₩10 million to Typhoon Hinnamore victims, and ₩40 million to help Turkey-Syria earthquake victims, all through The Hope Bridge Korea Disaster Relief Organization.

Plastic surgery

There is no evidence that Sejong underwent any surgery.

the facts

  • Sejong’s nickname, God Sejong, was given during her appearance Create 101 Because, she always got first or second position in that show.
  • She became a trainee just 1 year before joining Create 101.
  • Sejong once wrote a letter expressing bad feelings for her mother because of their poor financial situation.
  • In that letter, Sejong asked her mother to wait until she dealt with their family’s financial struggles.
  • Sejong is very good at imitating the expressions of cartoon characters.
  • IU is Sejeong’s role model.
  • She once won first place in a writing competition when she was 18 years old.
  • Sejong is labeled as the Korean solo artist who won the fastest in a music program with her song, Flower Road.
  • She became good friends with Wendy from Red Velvet and Nayun from April.
  • Sejong is also close to Jeon from T-ara and Spica from Jiwon.
  • Her ideal type is a mature man even though he is young.


  • 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
  • Uncanny Counter (OCN | 2020-2021), as Do Ha Na
  • I want to hear your song (KBS2 | 2019), as Hong Yi Young
  • School 2017 (KBS2 | 2017), as Ra Eun Ho
  • The voice of your heart (Naver TV | 2016-2017), as Newly Married Wife (cameo).


  • Warning (2021) – ft. Lil Boi
  • baby i love you (2021)
  • plant (2020)
  • Devmasa (2020)
  • all my days (2020) – Crash landing on your OST
  • what my heart says (2020) – Records of Yuva OST
  • see you again (2020) – Uncanny Counter OST
  • the tunnel (2019)
  • We, the Reds (2018) – With VIXX’s Leo
  • boyfriend (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)

programs on TV

  • Uncanny returns (tvN/OCN | 2021), as a cast member
  • Immortal songs 2 (KBS2 | 2020), as a contestant
  • King of Mask Singer (MBC | 2019), as contestant “Eliza”.
  • Happy together (KBS2 | 2018-2019), as special host
  • Big Picture Family (SBS | 2018), as a cast member
  • Salty Tour (tvN | 2018), as a cast member
  • Galileo: The Awakened Universe (tvN | 2018), as a cast member
  • Baek Jong-won’s Alley Restaurant (SBS | 2018), as special co-host
  • Fantastic pair (SBS | 2017), as a competitor
  • Boat Horn Clenched Fist (SBS | 2017), as a cast member
  • Forest Law in Sumatra (SBS | 2017), as a cast member
  • Battle trip (KBS2 | 2017), as a contestant and special host
  • Battle song (KBS2 | 2017), as a contestant
  • Get It Beauty (OnStyle | 2017), as a regular host
  • King of Mask Singer (MBC | 2017), as contestant “Workaholic Antgirl”.
  • 1 vs 100 (KBS2 | 2017), as a contestant
  • Immortal songs 2 (KBS2 | 2016), as a contestant
  • Boom (KBS2 | 2016), as a contestant
  • Talent for sales (KBS2 | 2016), as regular host
  • Create 101 (Mnet | 2016), as a contestant
  • K-Pop Star 2 (SBS | 2012–2013), as a contestant


  • 2019 KBS Drama Awards – K-Drama Hallyu Star – I want to hear your song
  • 2017 KBS Drama Awards – Best New Actress – School 2017
  • 2017 SBS Entertainment Awards – Best Challenge Award – Forest Law in Sumatra
  • 2017 The Soul 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’ve picked up some tips from the great stylists I’ve worked with.”

“My favorite outfits are still the ones that are comfortable to move around in as I go about my day. I’m thinking wide leg pants and cargo pants and tops, oversized shirts, hoodies or loose knitwear.”

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

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

“I am grateful that so many people want to know more about Kim Se-jeong after seeing the business proposal. As I see that fans are enjoying my music and previous television dramas, I am more determined to work hard so that I don’t feel ashamed of my future,” said the actor.

“I have never acted in a film. Although they look similar, I am sure that acting in a television drama and a movie are completely different. So I want to challenge myself in films, especially musicals.”

Frequently Asked Questions

Who is Kim Se Jong?

She is a South Korean actress and singer.

What is Kim Se Jeong’s real name?

Her real name is Kim Se Jeong (김세정).

What made Kim Se Jong famous?

She is famous through to join Prepare 101 in 2016 and for being in the show’s final lineup, as well as being a former member of the girl groups IOI 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 will be 27 years old as of 2023.

When does Kim Se Jeong celebrate her birthday?

It celebrates every 28th of 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. Moreover, there is no information about whether she is in a relationship or not.

Who is Kim Se Jeong’s ex-boyfriend?

None of her ex-boyfriends are known to the public. However, she was rumored to have dated 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’s nationality?

Her nationality is South Korean.

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

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

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