Jung Woo-seok (Korean: 정우석; born January 31, 1998), also known by the mononym Wooseok, is a South Korean rapper, singer, songwriter, and composer. He debuted as a member of the South Korean boy group Pentagon in October 2016 and also formed a duo with Lai Kuan-lin as Wooseok X Kuanlin in March 2019, under Cube Entertainment. In 2025, he created the project band KIK.

Early life and education

Wooseok was born in Gwangju, South Korea on January 31, 1998. In 2017, he graduated from the School of Performing Arts in Seoul. When he was a child, he played violin and piano, and he regularly participated in competitions and won awards.

Career

2016–2022: Debut with Pentagon, Wooseok X Kuanlin, and solo activities

Wooseok participated in Mnet's reality survival program, Pentagon Maker. He made his official debut with Pentagon on October 10, 2016 with the song "Gorilla" from their self-titled EP.

In 2017, Wooseok co-wrote the Produce 101 Season 2 hit song "Never" and Wanna One's debut title track, "Energetic" together with Pentagon's leader Hui. Later in September, Wooseok made a cameo with other members of Pentagon as the idol group Asgard in the drama Hello, My Twenties! 2. He appeared in the music video of labelmate Jeon So-yeon's debut song "Jelly" in November.

On March 24, 2018 Wooseok debuted as a model during 2018 F/W Hera Seoul Fashion Week for the designer brand R.Shemiste. On June 19, he was featured on the song "Ain't No Time" by Kim Dong-han from Kim's debut EP D-Day. On February 22, 2019, Cube Entertainment announced that Wooseok would be debuting in a new unit project alongside labelmate and former Wanna One member Lai Kuan-lin. The unit, Wooseok X Kuanlin, made their debut on March 11, 2019 with the title track "I'm A Star" and debut extended play, 9801. The EP contains two solo songs, "Always Difficult Always Beautiful" and "Domino", both of which were co-written and co-produced by Wooseok.

In 2020, Wooseok was cast in tvN's new variety show, Decoding Meow alongside Yoo Seon-ho which premiered on January 5. On January 14, Wooseok was featured in Jeong Young-eun's "Fine Day", and he participated in the song's lyrics. In October, Wooseok was confirmed as a contestant on the rap competition program Show Me The Money 9. During the 60 Second Team Trials, he received one pass and three fails from the producers, and was subsequently eliminated from the show.

On January 20, 2021, Wooseok was confirmed to make his web drama debut as the lead in Dingo Music's Fling at Convenience Store. In February, he starred in the web drama Nickname Pine Leaf for the SBS YouTube channel yogurD, where he plays two different versions of himself: PD Jung Seok-woo and Pentagon's Wooseok. In July, he was cast as the lead in his second Dingo Music web drama Those Who Want to Catch.

2023–present: Departure from Cube Entertainment and KIK

In April 2023, Wooseok replaced bandmate Shinwon as the DJ of Pentagon's Night Radio. He collaborated with Filipino singer Maymay Entrata on the song "Autodeadma", which was released on April 28. On October 9, it was announced that Wooseok had left Cube Entertainment alongside fellow Pentagon members Yeo One, Yan An, Yuto, and Kino. On December 21, he released a duet with singer Soyeon of Laboum titled "We Are I" as a part of MBTI Project.

On January 2, 2024, Wooseok signed an exclusive contract with UNDFND Entertainment, and announced an album and fan meeting within the first half of the year. He released his first single album Empty Paper with the lead single "Navy Blue" and the b-side "Sketch" on February 24. In late May, he released the English song "You" alongside Australian-Japanese producer Taka Perry. He released another version of the song featuring Finnish singer Robin Packalen in June.

In February 2025, Wooseok released the song "Romance", and appeared on an episode of King of Mask Singer. The following month, signed with S27M Entertainment to begin activities as an actor. In May, he released his debut EP, Ender to Ander. He collaborated with Japanese singer Chiaki Mayumura on the city pop song "Friday Night Kiss". Wooseok created the project band KIK alongside Jung Min-hyuk of Lacuna and Oh Myung-seok of SURL. Their self-titled debut EP was released in June, with the lead single "Simple". The same month, Wooseok was one of the six artists out of nearly 800 applicants selected for the CJ Cultural Foundation's Tune Up program, which supports indie artists by providing 25 million won for two album productions, concert support, and other benefits. He held a solo concert in Tokyo in August. In September, Wooseok was announced as a contestant on the band-making survival show Steal Heart Club. He also he co-wrote the singles "Fly to the Youth" by Nowz featuring Yuqi and "Gone" by Yuqi.

Discography

Extended plays

TitleDetailsPeak chart positionsSales
KOR
Ender to AnderReleased: May 13, 2025 Label: UNDFND Formats: Digital download, streaming

Singles

TitleYearPeak chart positionsAlbum
KOR
As lead artist
"Navy Blue"2024Empty Paper
"Angel"Digital Single
"Romance"2025Ender to Ander
"U"2026Digital Single
As featured artist
"Ain't No Time" (Kim Dong-han feat. Wooseok)2018D-Day
"Fine Day" (MosPick, Jeong Young-eun feat. Wooseok)2020Non-album singles
"Autodeadma" (Maymay Entrata feat. Wooseok)2023Digital Single
Collaborations
"This Stop Is" (with Hui and YooA)2018Gag-Singer Producer - Streaming
"We Are I" (with Soyeon)2023Digital Single
"You" (with Taka Perry)2024Digital Single
"Without" (with Someone Else's Rain)2024Digital Single
"Friday Night Kiss" (with Chiaki Mayumura)2025Digital Single
Soundtrack appearances
"How Can I Do" (with Jinho and Hui)2019Welcome to Waikiki 2 Part 4 OST
"—" denotes releases that did not chart or were not released in that region.

Songwriting credits

Filmography

Drama

YearTitleRoleNotesRef
2017Hello, My Twenties! 2Thor / Park Woo-seokCameo

Web series

YearTitleRoleNoteRef.
2021Fling at Convenience StoreHimselfMain role
Nickname Pine Leaf
Those Who Want to Catch

Variety shows

YearTitleNotesRef
2016Pentagon MakerContestant
2020Decoding MeowCast member
Show Me the Money 9Contestant
2021We CycleHost
2025King of Mask SingerContestant
TV Show Authentic TreasuresGuest Panelist
Steal Heart ClubContestant

Radio presenting

YearTitleNetworkNotesRef
2023–presentPentagon's Night RadioEBSDJ

External links