MJ, born Kim Myung-jun on March 5, 1994, in Suwon, South Korea, is a versatile singer and actor best known as the main vocalist of the K-pop group Astro. Debuting in 2016 under Fantagio Entertainment, MJ has showcased his dynamic vocal range across various genres, including K-pop and trot. In 2020, he expanded his repertoire by joining the trot idol group Super Five and making his musical theater debut as Jamie in "Everybody's Talking About Jamie." His solo endeavors include the 2021 trot single "Get Set Yo," produced by Young Tak. After completing his mandatory military service in 2023, MJ returned to the stage, starring in musicals such as "Winter Wanderer" and "Zorro: Actor Musician." In 2025, he formed the sub-unit Zoonizini with fellow Astro member Jinjin, releasing their debut EP "Dice." MJ's diverse talents and dedication continue to captivate audiences worldwide.