|Name||OOON | 오운|
|Full Name||Jeong Younghoon | 정영훈 | 鄭永勳|
|Born||January 15, 1993|
|Hometown||Namyangju, Gyeonggi, South Korea|
|Family||Mother, Father, Younger Brother|
|Years Active||2014 – present|
|Group||HALO (2014 – 2019)|
|Positions||Leader, Sub Vocalist|
2016 – 2017 KBS Hwarang: The Poet Warrior Youth Kibo
2015 KBS Cheer Up Lee Joonsu
2019 TBS, GYAO! Produce 101 JAPAN
Produce 101 JAPAN (2019)
|Artist | Title||101 Boys – It’s Coming|
- Hobby: Photography
- Specialties: Composing music, Writing lyrics
- Jeong Younghoon participates in Produce 101 JAPAN (2019) after the contract with High Star Entertainment expired in April 2019.
- He has a cocker spaniel named ZzooZzoo.
- He got LASEK eye surgery in April, 2015.
- Younghoon was K.will and SISTAR’s backup dancer.
- He named HALO’s fanbase HALOVE (HALO + LOVE).
- He said he has a fear of heights.
- Younghoon wanted to become an architect because one of his family members works as an architect and he also studied Architectural Engineering at the college.
- He likes beef tripe.
- He was a member of the college dance team.