Jeong Jae Hyun (born Jeong Jae Hyun, and legally changed his name to Jeong Yun Oh) is a South Korean singer, songwriter, actor, and rapper of the South Korean group NCT. He was born in Seoul and was cast into SM Entertainment in 2012after being discovered by street scouts in front of his school. On December 9, 2013, he was introduced as a member of the pre-debut trainee team SMROOKIES.
In April 2016, Jaehyun officially debuted as a member of NCT, in the first sub-unit NCT U, with the singles “The 7th Sense” and “Without You” On July 10, he debuted as a member of the second sub-unit: NCT 127 with the mini album “NCT #127”
He made his acting debut in the 2021 series “Dear M.”