Lee Dong Hun is the main vocalist of boy group A.C.E. He was a member of the group Plan B from Superstar K 5 and appeared on "I Can See Your Voice 4" on Episode 4 predebut. He also participated in YG’s survival program "MIXNINE" and ranked #8, making it into the final lineup. He is currently promoting with A.C.E.
He enlisted for his mandatory military service on September 23, 2021.
