Lee Dong-hyuck (Hangul: 이동혁) known by his stage name Haechan (Hangul: 해찬) is a South Korean singer and dancer born in Seoul on June 6, 2000 (he later moved to Jeju Island with his family and grew up there before becoming a trainee). He is the main vocalist and the lead dancer of NCT 127, NCT Dream, and NCT U. As a trainee, he used to be part of SMROOKIES, and appeared on the Korean Mickey Mouse Club with Super Junior's Leeteuk, the rest of the NCT Dream members from Korea, and SR15G in 2015.