Kim Dong-Hyun was born on September 17th, 1998, in Daejeon. He is a South Korean pop singer and a member of the boy band MXM. On March 9th, 2017, he appeared in public for the first time on the Mnet music program "M! Countdown." Beginning April 7th, he participated in the Mnet music survival program "Produce 101 Season 2." He ranked 28th overall and did not win the opportunity to debut with the program. On July 1st, he attended the "Produce 101 Season 2 Finale Concert" in Seoul. That same year, he formed a unit called MXM with Lim Young Min. They released their first mini-album "UNMIX," which marked their official debut.