Lee Gi-kwang (Korean: 이기광; born March 30, 1990), known professionally as Gikwang or Kikwang, is a South Korean singer-songwriter and actor. He originally debuted as solo singer with the stage name AJ (Ace Junior), releasing his first mini album First Episode: A New Hero on April 4, 2009. In October 2009, he debuted as the main dancer, visual and a lead vocalist of boy group BEAST which had been renamed to Highlight in February 2017.