La Coka Nostra (short LCN) is an American hip hop supergroup currently composed that of Danny Boy, Slaine, DJ Lethal, and Ill Bill. In 2004, it's creation started when Danny Boy (Daniel O'Connor) brought two young artists, Slaine (George Carroll) and Big Left (John Faster), to meet Dj Lethal (Leor Dimant) his DJ from his former group House of Pain. They decided to make a group, whose name came about, when O'Connor teased other members with that nickname, after they had a night out. They started releasing music on MySpace, and went viral.

Eventually, it was felt that there was a void and experienced rapper Ill Bill (William Braunstein) was asked to join. Eventually, former House of Pain colleague Everlast (Erik Schrody), showed interest to join. By 2008, the group consisted of O'Connor, Carroll, Diamant, Braunstein, and Schrody (who left some time after the first album was released). Their debut album A Brand You Can Trust was released on July 14, 2009, and it was appreciated by many for its raw sound that some felt missing from hip hop at the time.

In 2012, came their second album, Masters of the Dark Arts, which reached 176 on Billboard Top Current Albums, 40 on Independent Albums, and 31 on Top R&B/Hip-Hop Albums. Their third album To Thine Own Self Be True was released in 2016. The album reached 38 on the Billboard Top R&B/Hip-Hop Albums.