Biography

Junseo

준서 / Lee Jun-seo

Currently in AEN

Junseo (Lee Jun-seo) is a South Korean singer and a member of AEN, Starship Entertainment and Amuse's Korean-Japanese boy group scheduled to debut on August 5, 2026. A Starship trainee since 2023, he competed on the 2025 survival show Debut's Plan as a junior trainee.

  • Singer

Profile

Junseo is a South Korean singer and a member of AEN, the Korean-Japanese boy group produced by Starship Entertainment with Japan’s Amuse. He appeared on Starship’s 2025 survival project Debut’s Plan as a junior trainee before making AEN’s lineup.

Born in Seoul in 2007, he joined Starship in 2023 and prepares to debut with AEN’s first EP, A NEW ERA OF NOW, on August 5, 2026.

Facts

  • He was accepted as a Starship Entertainment trainee in 2023 and studied practical music at Hanlim Multi Art School. Kprofiles
  • He competed as a junior trainee on Starship's 2025 survival show Debut's Plan before being confirmed for AEN's debut lineup. Wikipedia EN — Debut's Plan

Works

Debut's Plan Contestant (junior trainee)
2025 / Reality show

FAQ

Who is Junseo in AEN?
Junseo (Lee Jun-seo, born February 15, 2007 in Seoul, South Korea) is one of the four Korean members of AEN, Starship Entertainment and Amuse's boy group debuting on August 5, 2026.
Was Junseo on Debut's Plan?
Yes, he competed as a junior trainee on Starship's 2025 survival project Debut's Plan before being announced as an AEN member.

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