Acting
Y:SY
Also Known As: 이서연, 서연, Lee Seo-yeon
Birth Date
January 22, 2000
(26 years old)
Place of Birth
Seoul, South Korea
Popularity
trending_up1
Biography
Lee Seo-yeon, known professionally as Y:SY, is a South Korean singer-songwriter and rapper under H1GHR Music. She is a former member of the girl group fromis_9, formed through the reality survival show Idol School (2017). She left the group in 2024. She made her solo debut on November 17, 2025, with the digital single Naked.
Photos
star8.5
TV Show
Lee Mujin Service
Guest
2022 • 1 episode
star8.7
TV Show
The Game Caterers
Self
2021 • 3 episodes
TV Show
Jae Joong and Friends
2023 • 1 episode
TV Show
The Silence Of IDOL
Seoyeon
2020 • 2 episodes
star9.0
TV Show
Idol School
Self - Contestant
2017 • 11 episodes
TV Show
Duckbap House
Self
2025 • 1 episode
star6.5
TV Show
Welcome to Heal Inn
2018 • 4 episodes
star10.0
TV Show
Fromis's Room
2017 • 5 episodes
TV Show
fromis_9's Summer Night
Self
2022 • 9 episodes
star6.5
TV Show
We See Winter
2019 • 2 episodes
TV Show
fromis_9's Autumn Night
Self
2022 • 13 episodes
Movie
fromis_9 concert ＜LOVE FROM.＞ IN JAPAN
2023
TV Show
프롤로그_프로미스의 방 엿보기
2017 • 1 episode