Born: 30th March '90 Birth place: Naju Blood Type: A Height: 170.4 cm Weight: 58 kg
Trained under JYPE for 4 years.
Debuted as a solo singer by the stage name Ace Junior 'AJ' and then a vocalist and main dancer in the group BEAST under Cube Entertainment.
Previously had acting roles in MBC's High Kick Through the Roof as SaeHo, MBC's My Princess as Lee Geon and MBC's I'm A Flower, Too as Jo Maru. He was an MC for MBC's Hot Brothers, SBS's Inkigayo and KBS's Win Win.