

Acting
Birthday: March 8, 1991 (34)
Place of Birth: Wonju, Gangwon, South Korea
Biography
Yoon Byung Ok, later legally changed to Yoon Ji Sung, is a South Korean singer, dancer, actor, and former member of WANNA ONE (워너원). He graduated from National Traditional Arts High School and later obtained a bachelor's degree in Theater and Film from Myongji College and a master's degree in Performing Arts from Dongguk University. Before debuting, he was a trainee at MMO Entertainment and served as a backup dancer of FIESTAR member Cao Lu. In mid-2017, he participated in the survival competition "Produce 101 Season 2" and managed to end up in 8th place, earning a spot in the resulting project group. He made his debut in August 2017 as WANNA ONE's leader and sub-vocalist with their first mini-album, "1X1=1 (To Be One)".
Known For
Select Role:
Thundercloud Rainstorm (2025)Age: 34as Lee Il-jo
Music in the Trip (2023)Age: 32as [Team Senior]
Boss Pet (2022)Age: 31
Hyunjae’s Now (2022)Age: 31
Let Me Be Your Knight (2021)Age: 30as Kim Yoo-chan
Idol Live Agent (2021)Age: 30
워너원 COMEBACK (2018)Age: 27
Wanna One 컴백 쇼 POWER OF DESTINY (2018)Age: 27
Star Road (2018)Age: 27
COMEBACK WANNA ONE : Nothing Without You (2017)Age: 26






