Sleepy
- Born
- 21 February 1984 (42 years)
- Place of birth
- Incheon, South Korea
- Gender
- Male
Kim Sung-won, better known by his stage name Sleepy, is a South Korean rapper. He is a member of the hip hop boy duo Untouchable. He released his solo debut single, "Cool Night", on June 16, 2015. He became a household name after appearing on reality TV shows like Real Men, I Live Alone, Law of the Jungle, and We Got Married.
