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NCT Wiki

Jeong Yun-o (Hangul: 정윤오) (born Jeong Jae-hyun; Hangul: 정재현) referred to as Jaehyun (Hangul: 재현) or Jay (in English) is a South Korean singer-songwriter, actor and rapper born in Seoul on February 14, 1997. He is one of the main vocalists and lead dancers of NCT U and a main vocalist, lead dancer, and sub rapper of NCT 127.

History on NCT


  • Stage Name: Jaehyun (재현)
  • Zodiac Sign: Aquarius
  • Position:
    • Main Vocalist
    • Lead Dancer
    • Lead Rapper
  • Nickname: Woojae, Jeffrey, J, Jeong Jaeyuk, Valentine Boy, Umchinah, Bbang Jae, Memory Manipulator, Peaches, Nation's first love, Jayhyen, Cha Minho, Jae, Yoonoh, Jay Hun, Heart Guy




Year Album Song Note
2019 Best Mistake OST "New Love" with Doyoung


= Participates as writing/composer/arrange ✖ = Not participated as writing/composer/arrange

NCT Discography

Album Song Writing Composer Arrange Ref.
NCT # 127 (NCT 127) (2016) Fire Truck
NCT Resonance Pt. 1 (NCT U) (2020) Dancing In The Rain



Year Title Channel Role Note
2021 Dear. M KBS2 Cha Minho, main character aired 2022

TV Shows

Year Title Channel Role Note
2014 EXO 90:2014 Mnet SM Rookies Member Pre-debut
2017 Law of the Jungle in Fiji SBS Cast Member
Family Discovery KBS2 Guest with Doyoung Chuseok Special
2018 Hello Counselor Guest with Doyoung Ep. 358
Happy Together Guest with Taeyong

Hosting Program

Year Title Channel Role Note
2015 Show Champion MBC Music MC January 21 – July 1 (with Doyoung)
2016 M Countdown Mnet Weekly Guest MC August 18 (with Doyoung)
2017 February 16 (with Seulgi & Wendy of Red Velvet)
June 15 (with Naeun of April & Wonpil of Day6)
2018 March 1 (with Taeyong)
March 29 (with Doyoung)
Global MC May 24 (with Doyoung & Yuta)
The Show SBS MTV Special MC December 4 (with Doyoung)
2019 The Show SBS MTV Special MC June 11
2019 – 2021 Inkigayo SBS MC October 20, 2019 - February 28, 2021 (with Minhyuk of Monsta X & Naeun of April)

Radio Program

Year Name Channel Role Note
2017-2019 NCT's Night Night! SBS Power FM Radio DJ with Johnny

Music Video

Year Title Artist MV Note
2017 The Little Match Girl Baek A Yeon x Wendy (Red Velvet) Official Video


Year Brand Notes
2020 Nature Republic with NCT 127



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To view the Jaehyun gallery, click here.