# Wooseok (정우석)
**Wooseok** (정우석; hanja 鄭禹碩), also romanized [Jung Woo](https://www.edgepedia.org/jung-woo)-seok or Jeong Woo Seok, is a South Korean rapper, singer-songwriter, and actor born 1998, best known as the main rapper and youngest member (maknae) of the boy group PENTAGON, which he joined at its October 2016 debut under [Cube Entertainment](https://www.edgepedia.org/cube-entertainment).[1](https://mydramalist.com/people/16800-jung-woo-seok) • [2](https://kpopping.com/profiles/idol/Wooseok) He is also one half of the 2019 project duo Wooseok X Kuanlin, a credited songwriter for acts including [Wanna One](https://www.edgepedia.org/wanna-one) and i-dle, and since 2024 a solo artist under the label UNDFND.[3](https://en.yna.co.kr/view/AEN20190313002500315) • [4](https://www.allmusic.com/artist/wooseok-mn0004121890) • [5](https://kprofiles.com/wooseok-pentagon-profile/)
| Key fact | Detail |
|---|---|
| Identity | Jung Wooseok (정우석, 鄭禹碩), born 1998; graduate of Seoul Performing Arts High School[1](https://mydramalist.com/people/16800-jung-woo-seok) • [6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D) |
| PENTAGON debut | October 10, 2016, as main rapper, sub-vocalist and maknae, with the mini-album *PENTAGON*[2](https://kpopping.com/profiles/idol/Wooseok) |
| Project unit | Wooseok X Kuanlin, with former Wanna One member Lai Kuan Lin; debut EP *9801* released March 11, 2019[3](https://en.yna.co.kr/view/AEN20190313002500315) |
| Songwriting | Composer credits on Wanna One's 2017 albums, PENTAGON's *In:vite U* and *Shine + Spring Snow*, and i-dle's *I Feel* (2023) and *I Sway* (2024)[4](https://www.allmusic.com/artist/wooseok-mn0004121890) |
| Agency changes | Left Cube Entertainment October 9, 2023 on contract expiry; signed with UNDFND Entertainment January 1, 2024; S27M Entertainment for acting from 2025[5](https://kprofiles.com/wooseok-pentagon-profile/) • [2](https://kpopping.com/profiles/idol/Wooseok) |
| Solo work | Solo debut *Empty Paper* on February 24, 2024; single 'YOU' with Taka Perry on May 26, 2024[5](https://kprofiles.com/wooseok-pentagon-profile/) • [7](https://www.youtube.com/@WOOSEOK.3) |
| 2025 activity | Vocalist and drummer of the project band KIK; exclusive concert 'Fire (Flower)' at Sogang University Mary Hall Daegeukjang; CJ Cultural Foundation Tune Up selection[2](https://kpopping.com/profiles/idol/Wooseok) • [8](https://en.stagepick.co.kr/artists/detail/KTRvss5gvoev6Yo2) • [6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D) |
## Early life and trainee period
Wooseok attended Yangji Elementary School and Jisan Middle School before graduating from Seoul Performing Arts High School in its Stage Arts Department.[6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D) He joined Cube Entertainment as a trainee in the second half of 2014, having originally auditioned with the intention of becoming a model rather than an idol.[5](https://kprofiles.com/wooseok-pentagon-profile/)
His path to debut ran through Mnet's survival program *[Pentagon](https://www.edgepedia.org/pentagon-south-korean-band) Maker* in 2016.[1](https://mydramalist.com/people/16800-jung-woo-seok) His profile lists his height as 191 cm and his MBTI as INFP.[5](https://kprofiles.com/wooseok-pentagon-profile/)
## Career with PENTAGON
Wooseok debuted with PENTAGON on October 10, 2016, with the self-titled mini-album *PENTAGON*, taking the positions of main rapper, sub-vocalist, and maknae, the youngest member of the group.[1](https://mydramalist.com/people/16800-jung-woo-seok) • [2](https://kpopping.com/profiles/idol/Wooseok)
**Songwriting within the group.** AllMusic credits him as composer on PENTAGON's *In:vite U* (2022) and on *Cerberus* and *Shine + Spring Snow*, the latter associated with the competition program [Road to Kingdom](https://www.edgepedia.org/road-to-kingdom), and as lyricist on 'Sparkling Night' and 'Feelin' Like'.[4](https://www.allmusic.com/artist/wooseok-mn0004121890) He also appears as a featured artist on bandmate Hui's *Whu Is Me : Complex*.[4](https://www.allmusic.com/artist/wooseok-mn0004121890)
**Broadcasting and modeling.** In 2020 he competed on the rap competition show *Show Me the Money 9* and was eliminated during the 60-Second Team Trials; he passed the second round's fire pit stage with a 1PASS but received no team selection, with judges commenting that his material was promising but unfinished.[2](https://kpopping.com/profiles/idol/Wooseok) • [6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D) In 2018 he debuted as a runway model at Hera Seoul Fashion Week alongside groupmate Shinwon, and he appeared with former PENTAGON member Dawn in Jeon Soyeon's 'Jelly' music video.[5](https://kprofiles.com/wooseok-pentagon-profile/)
## Wooseok X Kuanlin
In March 2019 Cube Entertainment formed the project unit Wooseok X Kuanlin (우석X관린), pairing Wooseok with Lai Kuan Lin, a former member of Wanna One whose group had disbanded.[3](https://en.yna.co.kr/view/AEN20190313002500315) The duo held a media showcase for their debut EP *9801* at Yes24 Live Hall in Seoul on March 11, 2019, and released the EP at 6 p.m. the same day.[3](https://en.yna.co.kr/view/AEN20190313002500315)
The EP contains five songs, including the main track 'I'm a Star', 'Hypey (Feat. Jackson Wang)', 'Always Difficult Always Beautiful', and 'Good Feeling'.[3](https://en.yna.co.kr/view/AEN20190313002500315) *9801* remained the duo's only EP.[1](https://mydramalist.com/people/16800-jung-woo-seok)
## Acting and broadcasting roles
His screen credits include a guest appearance as 'Thor' (Park U Seok) in *Hello, My Twenties! Season 2* (2017), a main role as Woo Seok in the 2021 drama *The Guys I Want to Catch* (10 episodes), *Nickname Pine Leaf* (2021, 3 episodes), and *Convenience Store Fling* (2021, 6 episodes).[1](https://mydramalist.com/people/16800-jung-woo-seok)
## Departure from Cube and activities since 2023
In October 2023, Cube Entertainment announced that Wooseok's contract had ended and would not be renewed; he left the agency on October 9, 2023, when his contract expired, but remained a member of PENTAGON.[1](https://mydramalist.com/people/16800-jung-woo-seok) • [5](https://kprofiles.com/wooseok-pentagon-profile/) On January 1, 2024, he signed an exclusive contract with UNDFND Entertainment (언디파인드 엔터테인먼트) for his music activities.[5](https://kprofiles.com/wooseok-pentagon-profile/) • [1](https://mydramalist.com/people/16800-jung-woo-seok) From 2025 his acting work is managed by S27M Entertainment.[2](https://kpopping.com/profiles/idol/Wooseok)
**Solo releases.** He made his solo debut on February 24, 2024, with *Empty Paper*.[5](https://kprofiles.com/wooseok-pentagon-profile/) • [6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D) The release is built on largely vocal tracks such as 'sketch' and 'Navy Blue', followed by the later releases 'YOU', 'Angel', 'U', and 'Loveholic'.[6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D) On May 26, 2024, he released the collaboration single 'YOU' with Taka Perry under the UNDFND label.[7](https://www.youtube.com/@WOOSEOK.3)
**Songwriting for other artists.** AllMusic credits him as composer on i-dle's EP *I Feel* (2023) and on *I Sway* (2024), extending his writing work beyond his own group after the Cube years.[4](https://www.allmusic.com/artist/wooseok-mn0004121890)
**2025: band project and live work.** In 2025 he re-debuted as vocalist and drummer of KIK, a three-member project band with Jeong Minhyuk of the band Lacuna and Oh Myungseok of SURL.[2](https://kpopping.com/profiles/idol/Wooseok) The same year he held the exclusive concert 'Fire (Flower)' at Sogang University Mary Hall Daegeukjang.[8](https://en.stagepick.co.kr/artists/detail/KTRvss5gvoev6Yo2) As a winning musician in the 2025 CJ Cultural Foundation indie-musician support program 'Tune Up' (튠업), he receives support for album production, mid-to-large-scale concert production, and global tours as he begins singer-songwriter activities in earnest.[6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D)
## Artistry and songwriting
His credits span three phases: PENTAGON's own catalog (*In:vite U*, *Shine + Spring Snow*, 'Sparkling Night', 'Feelin' Like'), the Wanna One albums *1 x 1=1 (To Be One)*, *1-1=0 (Nothing Without You)*, and *1¹¹=1 (Power of Destiny)* from 2017, where he is credited as composer and is separately named as co-writer of 'Energetic', and UNIT RED's 'No Way'.[4](https://www.allmusic.com/artist/wooseok-mn0004121890) • [5](https://kprofiles.com/wooseok-pentagon-profile/) The post-Cube phase adds i-dle's *I Feel* and *I Sway*.[4](https://www.allmusic.com/artist/wooseok-mn0004121890)
## By the numbers
PENTAGON released hits in Korea and Japan with EPs that reached the Top 20 of Billboard's World Albums chart.[9](https://www.liveone.com/artist/wooseok/8428169) His official YouTube channel, under the name 우석 WOOSEOK, counts about 20.9 thousand subscribers across 23 videos.[7](https://www.youtube.com/@WOOSEOK.3) The dated release timeline runs from the October 10, 2016 group debut through *9801* (March 11, 2019), *Empty Paper* (February 24, 2024), 'YOU' (May 26, 2024), and the 2025 KIK debut and 'Fire (Flower)' concert.[2](https://kpopping.com/profiles/idol/Wooseok) • [3](https://en.yna.co.kr/view/AEN20190313002500315) • [5](https://kprofiles.com/wooseok-pentagon-profile/) • [7](https://www.youtube.com/@WOOSEOK.3) • [8](https://en.stagepick.co.kr/artists/detail/KTRvss5gvoev6Yo2)
## Naming and source discrepancies
Romanization of his name varies across sources: MyDramaList prints Jeong Woo Seok and Jeong U Seok as variants, while the hanja form of his name is given as 鄭禹碩.[1](https://mydramalist.com/people/16800-jung-woo-seok) • [6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D) The format of *Empty Paper* is reported differently, as a single album by kprofiles and as a first EP by the Korean wiki.[5](https://kprofiles.com/wooseok-pentagon-profile/) • [6](https://namu.wiki/w/%EC%9A%B0%EC%84%9D)
## References
1. [Jung Woo Seok (정우석), MyDramaList](https://mydramalist.com/people/16800-jung-woo-seok)
2. [Wooseok (PENTAGON): Kpop Idol Profile, Kpopping](https://kpopping.com/profiles/idol/Wooseok)
3. [Cube's new project unit Wooseok X Laikuanlin in debut showcase, Yonhap News Agency (2019)](https://en.yna.co.kr/view/AEN20190313002500315)
4. [Wooseok: Biography, Discography, Albums & Expert Reviews, AllMusic](https://www.allmusic.com/artist/wooseok-mn0004121890)
5. [Wooseok (PENTAGON) Profile and Facts, Kprofiles](https://kprofiles.com/wooseok-pentagon-profile/)
6. [우석: 나무위키](https://namu.wiki/w/%EC%9A%B0%EC%84%9D)
7. [우석 WOOSEOK: Official YouTube channel](https://www.youtube.com/@WOOSEOK.3)
8. [Wooseok: Profile, Performance Info, StagePick](https://en.stagepick.co.kr/artists/detail/KTRvss5gvoev6Yo2)
9. [Wooseok: LiveOne](https://www.liveone.com/artist/wooseok/8428169)
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*Topic: Encyclopedia › Arts and culture › Music › Music scenes › East and Southeast Asian pop scenes › K-pop and the Korean popular music scene › Artists, groups, and people: K-pop and the Korean popular music scene › Third-generation idol groups › Surnames T to Z*
*Initially written Sep 17, 2026 · Reviewed: Sep 18, 2026; Sep 19, 2026; Oct 25, 2026 · Edited: Sep 18, 2026; Oct 12, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license