Y

Choi Sung-yoon (Hangul: 최성윤, born July 31, 1995), better known by his stage name Y (Hangul: 와이) is a South Korean singer. He is a member of the South Korean boy band Golden Child.

Pre-debut
Y starred in the TV series My Lovely Girl as Jun-jun, a member of a fictional boy band "Infinite Power", alongside co-member Dae Yeol and INFINITE's Hoya and L.

OST

 * "NEVER" (with Seung Min) (2019) [Part.3 for Legal High]
 * "Love Shaker" (with Seung Min and Joo Chan) (2020) [For Best Mistake 2]
 * "Come With Me" (with Ji Beom) (2020) [Part.1 for Lonely Enough To Love]

Collaborations

 * "NOW N NEW 2021" (with 61 other singers) (2021)

Trivia

 * He composed a song entitled "The Rest". It was aired in 2017 WoollimPick.
 * He has one older sister.
 * He has the same birthday and blood type as Joo Chan.
 * His MBTI is INFP.
 * He was strict with the younger members before debut, but has become much more relaxed and playful with them afterwards.