Jeong Yun-o (Korean: 정윤오; born Jeong Jae-hyun (Korean: 정재현); February 14, 1997), professionally known as Jaehyun, is a South Korean singer, rapper, songwriter, and actor. He is a member of the South Korean boy band NCT and its sub-units NCT 127 and NCT DoJaeJung. Jaehyun is recognized as one of NCT's all-rounders for his unique baritone vocals and skills in rapping and dancing.

First introduced in December 2013 as a trainee under the pre-debut team SM Rookies, he debuted in April 2016 as a...