Junseo (준서) is a South Korean singer, dancer, and actor under OUI Entertainment. His birth name is Kim Junseo (김준서), and he was born on November 20, 2001, in Ulsan, South Korea. He is best known as a member of the boy group WEi, a former member of 1THE9, and a member of the project group ALPHA DRIVE ONE (ALD1). Junseo gained attention through the survival show Under Nineteen, where he impressed viewers with his visuals and steadily improving performance skills. In addition to his music career, he has also ventured into acting, including a role in the BL drama Secret Relationship (2025).
Junseo Profile
| Full Name: | Kim Jun-seo |
| Birthday: | November 20, 2001 |
| Birthplace: | Ulsan, South Korea |
| Age: | 25 years old |
| Height: | 5 ft 10 in (178 cm) |
| Weight: | 141.1 lbs (64 kg) |
| Zodiac Sign: | Scorpio |
| Blood Type: | O |
| Nationality: | Korean |
| Education: | Mugeo High School |
| Position: | N/A |
Junseo Facts
- Junseo’s full name is Kim Junseo.
- He was born on November 20, 2001.
- He is from Ulsan, South Korea.
- He has a younger brother named Kim Junhui, who is two years younger than him.
- Junseo is left-handed.
- His height is around 177–178 cm (5’10”).
- His blood type is O.
- He attended Shinbok Elementary School, Mugeo Middle School, and Mugeo High School.
- He later passed the High School Graduation Academic Proficiency Test.
- His nicknames include Prince Junseo, Visual Prince, Face Genius, and Bean Sprouts Prince.
- Fans have praised his visuals since his trainee days.
- He can play the piano.
- He enjoys taking photos and selfies.
- He likes watching movies in his spare time.
- He believes the left side of his face looks better, so he often shows that side to the camera.
- He drinks at least two liters of water every day.
- His favorite food is his mother’s home-cooked meals.
- He also loves eating fried chicken.
- His favorite song is “Downpour” by I.O.I.
- His favorite season is winter.
- He has a pet dog named Pudding.
- He can speak English.
- His role models are BTS.
- He once said the word that best describes him is “freshness.”
- He wishes to travel to Jeju Island someday.
- He was a contestant on the survival show Under Nineteen.
- He ranked 9th on Under Nineteen and debuted with 1THE9 in 2019.
- 1THE9 officially debuted on April 13, 2019.
- The group disbanded on August 8, 2020.
- He was the last member announced for both 1THE9 and later WEi.
- Junseo officially debuted with WEi on October 5, 2020.
- In WEi, he serves as a Lead Dancer, Sub-Vocalist, and Maknae.
- His dancing skills improved significantly during Under Nineteen.
- Fans often consider him one of the strongest performers from the show.
- He is especially close to fellow WEi member Yongha.
- He is known for taking the longest time to get ready among the members.
- In 2025, OUI Entertainment announced that he would temporarily pause WEi activities for personal reasons.
- He later participated in the survival show Boys II Planet.
- Junseo ranked 8th on Boys II Planet and earned a place in ALPHA DRIVE ONE (ALD1).
- He made his acting debut in the BL drama Secret Relationship in 2025.
- His special talent is performing a breakfall.
- He once jokingly said that his greatest talent is his handsome face.
- He was ranked among the most fashionable contestants on Under Nineteen.
- His favorite ice cream flavor is Cookies & Cream.
- He dislikes hearing members sing while taking a shower.
Read: Jia Hao (ALD1) Profile.
Fans love Junseo for his striking visuals, charming personality, and impressive growth as a performer. His journey from Under Nineteen to 1THE9, WEi, and ALD1 showcases his determination and versatility. Many fans also appreciate his humble attitude, sense of humor, acting skills, and strong stage presence.