Gil Sung Joon, known professionally as Gill, is a South Korean rapper turned singer, producer and former member of X-TEEN, HONEY FAMILY and LEESSANG. He graduated from Gwacheon Foreign Language High School (focusing on German).

In 1997, he joined Kang Hee Geun (known also as Kang Gary) and other members to form hip-hop group X-TEEN. They debuted in 1998 with their 1st album "Reversal". However, they took a break right after that and came back in 2000 with several lineup changes. He and Gary decided to leave the group and joined co-ed hip-hop/rap group HONEY FAMILY. He was part of 2 albums and around late 2000, he joined Gary and fellow member Diggity in forming a sub-unit called LEESSAM, releasing a compilation album called "2000 Korea".

In 2002, Diggity left and the now duo changed their group's name to LEESSANG. Without any formal training, the duo spent countless hours inside a studio and released their 1st album, "Leessang of Honey Family". The title track, "Rush" (featuring Jung In) was a hit that is still seen as one of the best singles of the duo. Their mainstream success came until their 3rd album, "Library of Soul", released in 2005 where they finally became well-known in the country.

After many albums and collaborations with YB, Psy, Mi Woo, and many more, the duo decided to disband in 2017 to pursue their own endeavors. He has faced several controversies due to drunk driving but in 2023, he announced he signed an exclusive contract with MLD Entertainment hoping to return to the music scene once again.

(Source: Korean = NamuWiki || Translation = MyDramaList) Edit Biography