Kim Nam-joon (Korean: 김남준; born September 12, 1994), known professionally as RM (formerly Rap Monster), 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. The latter became the highest-charting album by a Korean solo artist in the United States in history when it peaked at number 26 on the Billboard 200. He made his official solo debut in 2022, with the release of his studio album Indigo. The project featured contributions from various artists including Erykah Badu and Anderson .Paak. It peaked at number three on the Billboard 200, becoming the highest-charting album by a Korean solo artist of all-time.[B] RM has also collaborated with artists such as Warren G, Krizz Kaliko, MFBTY, Primary, Gaeko, Wale, Fall Out Boy, Younha, Megan Thee Stallion, and Lil Nas X.