BTS: BTS (Korean: 방탄소년단; RR: Bangtan Sonyeondan) also called the Bangtan Boys and A.R.M.Y (Adorable Representative MC for Youth). It is a South Korean K-pop boy group formed by Big Hit Entertainment. The group debuted in Seoul in 2013. BTS has Seven members (Suga, Jin, J-Hope, RM, V, Jimin, and Jungkook). In 2013 BTS released their first studio album, 2 Cool 4 Skool. It is the best-selling artist in South Korea of all time.