Jeong Yuno (정윤오), born February 14, 1997 as Jeong Jaehyun (정재현) and known professionally as JAEHYUN (재현), is a South Korean performer. JAEHYUN is the main vocalist, lead dancer, sub-rapper and visual of K-Pop group NCT and its sub-units NCT DOJAEJUNG, NCT 127 and NCT U.

He debuted in 2016 as a member of NCT and sub-unit NCT U with the promotional singles “일곱 번째 감각 (The 7th Sense)” and “WITHOUT YOU,” released on April 8 and 10 respectively. On July 7, 2016, JAEHYUN went on to debut with NCT 127 through “소방차 (Fire Truck).” On the 9th of March, 2023, JAEHYUN was announced to be a part of sub-unit NCT DOJAEJUNG, alongside fellow members DOYOUNG and JUNGWOO, debuting on 17th of April, 2023 with the mini-album Perfume.

On November 24, 2017, JAEHYUN participated in his first project outside of NCT, the ballad “Try Again,” which featured R&B artist d.ear and took part in the second season of SM Entertainment’s project SM STATION.

In July of 2022, it was announced that JAEHYUN would release his first official solo song through SM STATION’s NCT-focused project NCT LAB. JAEHYUN’s solo debut, an R&B song titled “Forever Only,” was officially released on August 18, 2022.