Kim Nam-joon, known professionally as RM, is a South Korean rapper, songwriter, and record producer. He is the leader of South Korean boy band BTS, under Big Hit Entertainment. Born in Seoul and raised in Ilsan, RM began his music career in the underground Korean hip-hop scene as a teenager, going by the name Runch Randa. He joined Big Hit in 2010, and debuted as part of BTS in June 2013. RM released his first solo mixtape, RM, in 2015, followed by his second mixtape, Mono, in 2018.