Born on February 28, 1979, Jeon Se-won (전세원), better known by his stage name Ryan S. Jhun (Korean: 라이언 전), is a South Korean songwriter and producer. Jhun is known for his work with various K-pop soloists and idol groups, getting his start through acts from SM Entertainment such as Shinee, Super Junior, f(x), Taeyeon, Exo, NCT and TVXQ. He has since produced for several artists from other labels like IU, LOONA, Lee Hyo-ri, U-Kiss, Girl’s Day, Twice, and Oh My Girl, as well songs for audition programs Produce 101 and My Teenage Girl.
He founded and became chief executive officer of music production and publishing company Marcan Entertainment. He is also the CEO of Ateam Entertainment, where he produced for the label’s groups VAV and BugAboo.