Up-close with ‘Produce 101’s Runner Up and Gugudan’s Main Vocal, Kim Sejeong!


Find Out More About Gugudan‘s Kim Se-jeong!

Do you know about the finalist of Mnet’s survival show’s Produce 101 and a former girl group member, Gugudan’s Kim Se-jeong? Other than for her beautiful face, she is also known for her golden voice as she became the main vocalist of the group and has sung for a drama OST. After Gugudan disbanded, Kim Se-jeong is more active as an actress. One of her popular dramas is Business Proposal.

At this time, we’re going to find out more about Gugudan’s Kim Se-jeong’s profile, career, and latest news! Let’s scroll down and check out the article below.

Sejeong’s Full Profile


Real Name: Kim Se-jeong (김세정)

Stage Name: Se-jeong (세정)

Place and Date of Birth: Gimje, North Jeolla, South Korea, August 28th, 1996

Zodiac: Virgo

Weight: 48 kg

Height: 164 cm

Blood Type: AB

Education: Hanyang Women’s University

Occupation: Idol, Singer, Actress

Talent Agency: Jellyfish Entertainment

Official Website: Jellyfish Entertainment Official Website (http://www.jelly-fish.co.kr/sub/artist_singer02.php?prof_id=32)

Twitter (https://twitter.com/gu9udan?lang=en)

Instagram (https://www.instagram.com/gu9udan/?hl=en)

Fun Facts About Kim Sejeong

  1. Kim Se-jeong has an older brother.
  2. Kim Se-jeong’s specialties are listening to music and singing.
  3. Her hobbies are painting and re-watching some of her favorite movies.
  4. Kim Se-jeong was one of the finalists of Mnet’s Produce 101 and debuted as a member of the girl group I.O.I.


  5. After finishing her promoting as a member of I.O.I and the disbandment of the group, Kim Se-jeong returned to her label and debuted as a member of Gugudan in 2016.


  6. Kim Se-jeong participated as a contestant in K-Pop Star 2 during the second season in 2012.
  7. Kim Se-jeong remained on the first and second place during the competition in Produce 101 which is why she got the nickname God Se-jeong.”
  8. Kim Se-jeong’s trainee period was only one year before she appeared in Produce 101.
  9. Kim Se-jeong is such very good daughter of her family. She wrote a letter that she felt bad for her mother because they were poor and she needs to achieve her dream to become an idol. Se-jeong even promised to her mother that someday she would provide for her family’s needs.
  10. Kim Se-jeong won the 1st place in a writing competition when she was 18 years old.
  11. IU is Kim Se-jeong’s role model.
  12. Kim Se-jeong released the song If Only” for Legend Of The Blue Sea’s drama OST on January 12th, 2017.
  13. Kim Se-jeong was a host for Talents for Sale and a permanent MC for Get It Beauty, in January 2017.


  14. Kim Se-jeong won at a live music show with her song “Flower Road,” produced by Zico and she was the fastest Korean solo artist to have won and reach the top rank.


  15. Kim Se-jeong acted together with ASTRO’s Cha Eun-woo in the Lotte Water Park CF.
  16. Kim Se-jeong made her debut as a leading actress in the drama School 2017 and played the character of Ra Eun-ho.


  17. Kim Se-jeong is a cast member of the variety show Busted! aired on Netflix, along with other cast members, such as Yoo Jae-suk, EXO’s Sehun, and Lee Kwang-soo.


  18. Kim Se-jeong’s ideal type is someone who can be really mature at an early age.

Pre-debut: K-Pop Star 2


Before joining the competition in Mnet’s Produce 101, Kim Se-jeong participated in K-Pop Star 2 when she was still only 16 years old. Although she didn’t make it into the second round audition, YG Entertainment’s CEO, Yang Hyun-suk, who was a judge at that time, brought her back where she performed BIGBANG’s Taeyang’s “I Need A Girl,” featuring another contestant, namely Jo Yoo-min.

Check out Kim Se-jeong’s performance in K-Pop Star 2 while performing BIGBANG’s Taeyang’s “I Need A Girl” in the video below.

For the next performance, Kim Se-jeong was cast by Yang Hyun-suk to team up with other contestants, namely Nicole Curry and Lee Soo-kyung, for the final casting round but they ended up eliminated from the competition.

Check out Kim Se-jeong’s performance with Nicole Curry and Lee Soo-kyung while performing “Come On Over” by Christina Aguillera on K-Pop Star 2 in the video below!

Sejeong in Produce 101


Many of Se-jeong’s fans actually took note of her after her appearance in Produce 101 and her popularity started to increase since then. As you know from before, Kim Se-jeong joined Produce 101 as a contestant in January 2016. Kim Se-jeong represented her label, Jellyfish Entertainment, with two other trainees, namely Kang Mi-na and Kim Na-young.

Check out Kim Se-jeong, Kang Mi-na, and Kim Na-young’s first audition in Produce 101 in the video below!

The 3 trainees from Jellyfish Entertainment were assigned to Group A in the first episodes and Kim Se-jeong constantly achieved the first rank and mostly the highest ranks in several episodes. This is how the nickname “God Sejeong” first came to be.


On April 1st, 2016, Produce 101 came to the final episode and they announced some of the trainees who made into the final line-up of Mnet’s girl group I.O.I. Kim Se-jeong was one of the contestants who made it to the top 11 poll-winners and reached the second overall rank with 525,352 votes. Kim Se-jeong debuted as a member of I.O.I and started promoting with the group for events and CF.


Debut with I.O.I

As a member of one of the top girl groups in South Korea, Kim Se-jeong had a tight schedule with promoting for various events, making stage comebacks, fan signing, concerts, variety shows, and a lot more.

Here are some photos of Kim Se-jeong from when she was promoting as a member of I.O.I.


Don’t forget to check out I.O.I’s music videos below!

Debut with Gugudan


Kim Se-jeong was busy with her own solo career as an MC of variety shows. Additionally, she was also promoting her new single, “Flower Road” (꽃길), produced by Zico and even the release of the music video for the song as well.

On June 10th, 2016, YMC Entertainment announced that Kim Se-jeong will be returning to her agency, Jellyfish Entertainment, after promoting with I.O.I has ended and she will debut with the upcoming girl group, Gugudan.


Gugudan (구구단) is a girl group under Jellyfish Entertainment that debuted on June 28th, 2016, with 8 members, namely Se-jeong, Mimi, Hana, Hae-bin, Na-young, Mina, Sally, Soyee. One of their members, Hye-yeon, left the group on October 25th, 2018.

Check out Gugudan’s debut single “Wonderland” in the video below!

On July 10th, 2018, Kim Se-jeong was added to Gugudan’s subunit, Saemina, along with two other members, Mina and Na-young. Saemina released their first single titled “Saemina.”


Check out Semina’s music video below!