Kim Jun-seo

Kim Jun-seo
Kim Jun-seo
	File:Kim Jun-seo (김준서) 220323.pngKim_Jun-seo_(김준서)_220323.png Kim Jun-seo in March 2022
Born	November 20, 2001 (age 24); Ulsan, South Korea
💼 Occupation	Singer; Actor;

Kim Jun-seo (Hangul: 김준서; born November 20, 2001) is a South Korean singer and actor. He is a member of the boy group WEi and a former member of boy group 1THE9. He is best known for competing on the Mnet reality competition show Boys II Planet, where he ranked 8th in the final episode, earning him a spot in the South Korean boy group named Alpha Drive One, or ALD1.^[1] Kim made his acting debut as the main cast member in the 2025 web series, Secret Relationships.^[2]^[3]

Early life

Kim was born on November 20, 2001 and was raised in Ulsan, South Korea. He has a younger brother named Kim Jun-hui.

Career

2018–2019: Under Nineteen and 1THE9

Kim first became known in 2018, while competing in the reality survival show Under Nineteen, a show designed to form a temporary boy group of 9 members, chosen by the public. Kim was the first trainee representing the show's performance team, and performed "Uptown Funk" for his first evaluation on the show.^[4] Kim finished in ninth place in the competition and debuted as a member of 1THE9 on April 13, 2019 with their extended play XIX.^[5] The group released 4 extended plays and disbanded on August 8, 2020 after 17 months of promotions.^[6]

2020-2024: Debut with WEi

On June 17, 2020, Oui Entertainment announced they will be debuting a new boy group in the second half of the year.^[7] The group, named "위아이" or "WEi", launched its official social media accounts on July 10.^[8]^[9] On August 12, Oui Entertainment confirmed that Kim would join WEi after completing his promotions with 1THE9.^[10]^[11]

Kim debuted with WEi on October 5, 2020, with the release of their extended play Identity: First Sight, featuring the title track "Twilight".^[12]

On November 8, 2024, Kim was announced to be making his acting debut as the lead role in the live action adaptation of BL webtoon "Secret Relationships".^[13]

2025-present: Boys 2 Planet and Alpha Drive One

On May 9, 2025, Oui Entertainment announced that Kim would be going on a temporary hiatus from group activities in order to participate in the Mnet reality survival program Boys II Planet.^[14]

On September 25, 2025, Kim placed eight on Boys II Planet with a total of 3,856,677 points, securing his debut in South Korean boy group Alpha Drive One (abbreviated as ALD1).^[15]

Discography

Songwriting

All song credits are adapted from the Korea Music Copyright Association's database, unless otherwise noted.^[16]

Year	Song	Artist(s)	Album	Lyrics
Year	Song	Artist(s)	Album	Credited	With
2020	"Hug You" (안고 싶어)	WEi	Identity: First Sight	Yes	Vendors, Jang Dae-hyeon, Kim Dong-han
2021	Diffuser	WEi	Identity: Challenge	Yes	OUOW

Filmography

Web series

Year	Title	Role	Ref.
2025	Secret Relationships	Jung Da-on	^[17]

Television shows

Year	Title	Role	Notes	Ref.
2018	Under Nineteen	Contestant	Finished 9th	^[5]
2025	Boys II Planet	Contestant	Finished 8th	^[14]

Notes

↑ As a member of 1THE9 only.
↑ As a member of Alpha Drive One only.

References

↑ "Meet The 'BOYS II PLANET' Winners: ALPHA DRIVE ONE, A.k.a. ALD1". forbes.com. 25 September 2025. Retrieved 27 September 2025.
↑ "'Secret Relationships' adapted into drama series, web novel". koreaherald.com. 28 February 2025. Retrieved 27 September 2025.
↑ "'Secret Relationship' soars to top of WATCHA and dominates iQIYI new releases". biz.chosun.com. 5 March 2025. Retrieved 27 September 2025.
↑ Kim, Min-jung (November 13, 2018). "'언더나인틴울산 박보검' 퍼포먼스 예비돌 김준서 등장에 '급관심'" (in 한국어). Retrieved May 22, 2025 – via Naver.
↑ ^5.0 ^5.1 Ahn, Yoon-ji (February 9, 2019). "'언더나인틴' 1위는 전도염…최종 9인 원더나인 데뷔 확정(종합)" (in 한국어). Retrieved May 10, 2025 – via Nate.
↑ Baek, Ah-young (August 16, 2020). "원더나인, '음악중심' 통해 굿바이 무대 "원더랜드와 함께이기에 행복했다"" (in 한국어). Retrieved May 22, 2025 – via Naver.
↑ Ji, Min-kyung (July 10, 2020). "위보이즈 장대현·김동한·김요한·강석화, 의문의 티저 이미지 기습 공개" (in 한국어). Retrieved May 22, 2025 – via Naver.
↑ Lee, Min-ji (July 11, 2020). "'김동한→김요한' 위보이즈, 정식 팀명 '위아이(WEi)' 확정(공식)" (in 한국어). Retrieved May 22, 2025 – via Naver.
↑ Shim, Eon-kyung (September 9, 2020). "위아이 김준서, 방탄소년단 지민 버전 'Take you down' 댄스 커버 공개" (in 한국어). Retrieved May 22, 2025 – via Naver.
↑ Kim, Soo-young (August 12, 2020). "원더나인 출신 용하X준서, 위아이 합류…김요한·김동한 함께한다 [공식]" (in 한국어). Retrieved May 22, 2025 – via Naver.
↑ Park, Seung-hyun (September 1, 2020). "[앳뉴스] '위인전' 위아이 용하-준서, 첫 합류로 완전체 케미→럭셔리 새 숙소 공개" (in 한국어). Retrieved May 22, 2025 – via Naver.
↑ Jeong, Hee-yeon (October 5, 2020). "[DA:투데이] 위아이 데뷔…장대현→김요한 올라운더 6인에 거는 기대" (in 한국어). Retrieved December 8, 2020 – via Naver.
↑ Ahn, Byung-gil (November 8, 2024). "김준서, BL 기대작 '비밀사이' 주연" (in 한국어). Retrieved December 8, 2024 – via Naver.
↑ ^14.0 ^14.1 Lee, So-jeong (May 10, 2025). "[단독] BL 찍더니 '보플2' 출격…'김요한 그룹' 김준서, 7년 차에 세 번째 아이돌 도전" (in 한국어). Retrieved May 10, 2025 – via Naver.
↑ Park, Jun-hee (September 26, 2025). "'Boys Planet' Season 2 ends with 8 winners who will debut as Alpha Drive One". The Korea Herald. Retrieved September 26, 2025 – via Naver.
↑ "Songs Registered Under KIM JUN SEO (10024016)". Korea Music Copyright Association. Retrieved January 13, 2024.
↑ Ji, Min-kyung (February 26, 2025). "플레이리스트 첫 BL 드라마 '비밀 사이', 2월 27일 공개 [공식]" (in 한국어). Retrieved February 27, 2025 – via Naver.

External links

Kim Jun-seo on Instagram
Kim Jun-seo on IMDb

Template:WEi

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[1THE9-1] As a member of 1THE9 only.

[ALD1-2] As a member of Alpha Drive One only.

[3] "Meet The 'BOYS II PLANET' Winners: ALPHA DRIVE ONE, A.k.a. ALD1". forbes.com. 25 September 2025. Retrieved 27 September 2025.

[4] "'Secret Relationships' adapted into drama series, web novel". koreaherald.com. 28 February 2025. Retrieved 27 September 2025.

[5] "'Secret Relationship' soars to top of WATCHA and dominates iQIYI new releases". biz.chosun.com. 5 March 2025. Retrieved 27 September 2025.

[6] Kim, Min-jung (November 13, 2018). "'언더나인틴울산 박보검' 퍼포먼스 예비돌 김준서 등장에 '급관심'" (in 한국어). Retrieved May 22, 2025 – via Naver.

[1the9-7] 5.0 ^5.1 Ahn, Yoon-ji (February 9, 2019). "'언더나인틴' 1위는 전도염…최종 9인 원더나인 데뷔 확정(종합)" (in 한국어). Retrieved May 10, 2025 – via Nate.

[8] Baek, Ah-young (August 16, 2020). "원더나인, '음악중심' 통해 굿바이 무대 "원더랜드와 함께이기에 행복했다"" (in 한국어). Retrieved May 22, 2025 – via Naver.

[9] Ji, Min-kyung (July 10, 2020). "위보이즈 장대현·김동한·김요한·강석화, 의문의 티저 이미지 기습 공개" (in 한국어). Retrieved May 22, 2025 – via Naver.

[10] Lee, Min-ji (July 11, 2020). "'김동한→김요한' 위보이즈, 정식 팀명 '위아이(WEi)' 확정(공식)" (in 한국어). Retrieved May 22, 2025 – via Naver.

[11] Shim, Eon-kyung (September 9, 2020). "위아이 김준서, 방탄소년단 지민 버전 'Take you down' 댄스 커버 공개" (in 한국어). Retrieved May 22, 2025 – via Naver.

[12] Kim, Soo-young (August 12, 2020). "원더나인 출신 용하X준서, 위아이 합류…김요한·김동한 함께한다 [공식]" (in 한국어). Retrieved May 22, 2025 – via Naver.

[13] Park, Seung-hyun (September 1, 2020). "[앳뉴스] '위인전' 위아이 용하-준서, 첫 합류로 완전체 케미→럭셔리 새 숙소 공개" (in 한국어). Retrieved May 22, 2025 – via Naver.

[14] Jeong, Hee-yeon (October 5, 2020). "[DA:투데이] 위아이 데뷔…장대현→김요한 올라운더 6인에 거는 기대" (in 한국어). Retrieved December 8, 2020 – via Naver.

[15] Ahn, Byung-gil (November 8, 2024). "김준서, BL 기대작 '비밀사이' 주연" (in 한국어). Retrieved December 8, 2024 – via Naver.

[bp2-16] 14.0 ^14.1 Lee, So-jeong (May 10, 2025). "[단독] BL 찍더니 '보플2' 출격…'김요한 그룹' 김준서, 7년 차에 세 번째 아이돌 도전" (in 한국어). Retrieved May 10, 2025 – via Naver.

[17] Park, Jun-hee (September 26, 2025). "'Boys Planet' Season 2 ends with 8 winners who will debut as Alpha Drive One". The Korea Herald. Retrieved September 26, 2025 – via Naver.

[KMCA-18] "Songs Registered Under KIM JUN SEO (10024016)". Korea Music Copyright Association. Retrieved January 13, 2024.

[19] Ji, Min-kyung (February 26, 2025). "플레이리스트 첫 BL 드라마 '비밀 사이', 2월 27일 공개 [공식]" (in 한국어). Retrieved February 27, 2025 – via Naver.

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