Kim Nam-joon, 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.

Kim Nam-joon was born on September 12, 1994, in Dongjak District, Seoul, South Korea and grew up in Ilsan District, Goyang, where his family moved when he was aged four or five. He has a younger sister. As a child, RM largely learned English by watching the American Sitcom Friends with his mother. As a student, he actively wrote poetry and often received awards for his writing. He posted his work to an online poetry website for roughly one year, where he received moderate attention. As a result, RM expressed interest in pursuing a literary career but later decided against it. When he was twelve years old, he studied in New Zealand for four months. As a student, RM had an IQ of 148 and scored in the top 1% of the nation in the university entrance examinations for language, math, foreign language and social studies. In March 2019, after graduating from Global Cyber University with a degree in Broadcasting and Entertainment, RM enrolled at Hanyang Cyber University's Master of Business Administration program in Advertising and Media.

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 soloist in the United States in history when it peaked at number 26 on the Billboard 200. RM made his official solo debut in 2022 with the release of his studio album Indigo, which featured contributions from Erykah Badu and Anderson .Paak. The album peaked at number three on the Billboard 200, becoming the highest-charting album by a Korean soloist of all-time. He has also collaborated with artists such as Wale, Younha, Warren G, Gaeko, Krizz Kaliko, MFBTY, Fall Out Boy, Primary, and Lil Nas X.