He was born on February 1, 1996, in Guri, Gyeonggi, South Korea.
In April 2016, DOYOUNG officially debuted as a member of NCT, in the unit NCT U, with the single "The 7th Sense".
In January 2017, he was added as a new member to NCT 127.
- [2016.12.18] First Christmas (with JOY)
- [2017.10.13] Star Blossom (별빛이 피면) (with Sejeong)
- [2019.05.06] Don't say goodbye (헤어지지 말아요, 우리) (with Rocoberry)
- 2016: "COOL" (with KEY) [38 Revenue Collection Unit OST]
- 2017: "Stay in my Life" (with TAEIL & TAEYONG) [School 2017 OST]
- 2018: "Radio Romance" (with TAEIL) [Radio Romance OST]
- 2018: "Hard for Me" [Rich Man OST]
- 2019: "New Love" (with JAEHYUN) [Best Mistake OST]
- 2019: "Baby only you" (with MARK) [The Tale of Nokdu OST]
As a featured artist
- 2016: "Sound of Your Heart" (너의 목소리) (with YESUNG, SUNNY, LUNA, SEULGI, WENDY, TAEIL)
- 2019: "This is your day" (STATION X UNICEF) (with Suho, Sunny, BoA, Siwon, Wendy, Taemin and J-Min)
- 2015: Show Champion (쇼 챔피언)
- 2016: First Pitch King Tomorrow (Chuseok's special)
- 2016: Lipstick Prince (립스틱 프린스)
- 2017: We got Married (ep. 363)
- 2017: Trick & Treat (with Jaehyun)
- 2017: Family Discovery (with Jaehyun)
- 2017–2018: Inkigayo (인기가요) MC.
- 2018: Hello Counselor (with Jaehyun and Mark)
- 2018: Amazing Saturday (ep. 38)
- 2019: King of the Masked Singer (ep. 209-210) Won 3rd round.
- 2019: Law of the Jungle (ep. 388-393)
- Favorite Artist: Eric Benét
- Favorite Food: Cream cheese bread, watermelon, popcorn, mango-flavored treats, white chocolate, peach
- Favorite Colour: Blue
- Hobbies: Playing the flute
- He was cast into SM Entertainment in 2013.
- His older brother is Gong Myung (Kim Dong Hyun) from the boy group 5urprise.
- He looks up to D.O. from EXO.
- He won 1st place at the Gyeonggi Youth Arts Festival in 2013.
- He was in a band called "Heart Attack" with friends during school days.
- He hates cucumbers.
- Doyoung was the first person who wasn't in NCT Dream to post on NCT Dream's Instagram account.
- Has good memorization skills.
- He was voted as the most reliable member in NCT NightNight.
- If he wasn't a singer he would be a baker.
- He has a doll that he sleeps with called “Jippong”.
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