Gil Seong-joon (Hanja: 吉成俊; born February 15, 1978), better known by his stage name Gill (Korean: 길), is a South Korean singer and television personality. He has been active since 1997. He debuted in the group X-Teen (1997-1999) and then joined the rap group Honey Family (1999-2007). He briefly joined the group "리쌈 트리오" with fellow Honey Family member Gary in 2000. Also along with Gary, they were apart and produced the rap duo, Leessang (2002-2017). He has also made cameo appearances in Psy's "GENTLEMAN" (2013) music video and Lee Hyori's "Bad Girls" (2013). He has so far has made appearances on many Korean TV entertainment programs, including being a judge for The Voice Korea.