Kim Myeong-jun (김명준), better known as stage name MJ, is a South Korean singer under Fantagio Music. He debuted in 2016 as the main vocalist of the boy group ASTRO.
In August 2020, he debuted as one of the five members of the idol trot group, 'Super Five' through MBC's trot reality/survival show Favourite Entertainment.
In April 2020, it was confirmed that MJ, was cast for the Korean version of the musical 'Everybody's Talking About Jamie', originally a British musical based on a true story of a teenager named Jamie, who aspires to become a drag queen.
On May 9, 2022 MJ enlisted in the military band as part of his mandatory military service.