ArtistOui Entertainment
Kim Jun-seo
Kim Jun-seo (김준서), born November 20, 2001, in Ulsan, is a South Korean singer who has navigated two debut cycles within five years. He first appeared on MBC's Under Nineteen in 2018 and debuted with project group 1the9 in March 2019 alongside fellow WEi member Yoo Yong-ha. After 1the9 concluded, he signed with Oui Entertainment and became the youngest founding member of WEi at their October 5, 2020 debut. In May 2025, he announced a hiatus from WEi activities, which was later revealed to be linked to his participation in Boys II Planet, Mnet's survival show. He placed successfully and debuted with Alpha Drive One in November 2025 while technically remaining a WEi member under Oui Entertainment. This dual-active status makes him one of the rare K-pop artists currently operating across two active group projects simultaneously. His Instagram at @kimjunseo_official tracks both his WEi and Alpha Drive One activities.
1 articles7 creditsDebut: March 27, 2019South Korean
Fans Also Ask
Is Kim Jun-seo still in WEi?
Yes, Kim Jun-seo remains a WEi member under Oui Entertainment. In 2025, he took a hiatus to participate in Boys II Planet and subsequently debuted with Alpha Drive One in November 2025. He is technically dual-active across both groups as of early 2026.
How did Kim Jun-seo join Alpha Drive One?
Kim Jun-seo joined Alpha Drive One after competing on Mnet Boys II Planet in 2025. He announced a temporary hiatus from WEi in May 2025 to participate and debuted with Alpha Drive One in November 2025 while maintaining his WEi membership.
What was Kim Jun-seo in before WEi?
Before WEi, Kim Jun-seo debuted as part of 1the9, a nine-member project group formed from MBC Under Nineteen survival show. 1the9 was active from March to October 2019. Both he and Yoo Yong-ha from WEi were members of 1the9.
What drama did Kim Jun-seo star in?
Kim Jun-seo made his acting debut in the BL drama Secret Relationship in 2025. The role marked his first foray into acting alongside his music career with WEi, demonstrating range beyond his identity as a K-pop idol.
Did Kim Jun-seo compete on Boys II Planet?
Yes. In 2025, Kim Jun-seo went on hiatus from WEi to compete on Mnet Boys II Planet survival show. He ranked 8th overall, earning a debut spot in Alpha Drive One (ALD1), a global project group under WAKEONE Entertainment that debuted in November 2025.
