Moon Hee-Joon (Hangul: 문희준) is a South Korean pop-rock singer-songwriter.

Moon initially rose to fame as the leader of the South Korean boy-group H.O.T which debuted in 1996 under SM Entertainment. H.O.T is considered to be the first K-pop idol group and are seen as the blueprint for many K-pop groups that followed after them. After the group’s disbandment in 2001, Moon started a solo career with his first album “Alone.”

On November 25, 2016, Moon announced that he would be marrying Park Hye-Kyeong, also known as Soyul of Crayon Pop. The wedding was held on February 12, 2017, in Seoul.