A member of ASTRO under Fantagio Entertainment, MJ, whose real name is Kim Myung Jun, is the main vocalist of the group.
He is 27 years old. His horoscope sign is Pisces and his date of birth falls on 5 March 1994.
Standing at a height of 175 cm, MJ weighs 58 kg. His blood type is O.
He is from South Korea.