Lee Ji-hoon (이지훈) is a South Korean singer and television, film, and musical theater actor.  He is a member of the vocal group, S.

He was cast in 1994 while in middle school and trained for two years before debuting as a singer in 1996 with his first album Rhythm Paradise. The title track Why the Sky quickly rose to the top of music charts, earning him the nickname "Prince of Ballads" and establishing him as one of the most popular teen stars of the late 1990s. Although he also pursued dance music, his career took a dramatic turn when he suffered an injury during a live performance of Goodbye Love.