Kim Ryeo-wook (Hangul: 김려욱; born 21 June, 1987), better known by the mononym Ryeowook, is a South Korean singer and actor. He is a member of the South Korean boy band Super Junior and its subgroups, Super Junior-K.R.Y. and Super Junior-M. Along with four other Super Junior members, he is one of the first Korean artists to appear on Chinese postage stamps. He made his solo debut and released first EP The Little Prince in 2016. He released a duet, titled “Cosmic”, with Bada on 23 September 2016 before he went for enlistment in 11 October 2016.