Ong Seong-wu

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Ong Seong-wu
Born (1995-08-25) August 25, 1995 (age 24)
Incheon, South Korea
Alma materDong Seoul University
  • Singer
  • actor
Years active2017–present
Musical career
Associated actsWanna One
Korean name
Revised RomanizationOng Seong-u
McCune–ReischauerOng Sŏngu옹성우
Ong Seong Wu Signature.png

Ong Seong-wu (Hangul: 옹성우, born August 25, 1995) is a South Korean singer-songwriter and actor. He is known for his participation in the survival reality show Produce 101 Season 2, where he finished in fifth place, and is a former member of the show's derivative boy group Wanna One.[1] Following Wanna One's disbandment, Ong made his acting debut with cast At Eighteen (2019). Ong also established his career as a solo artist with the release of his first extended play Layers on March 25, 2020.

Early life[edit]

Ong Seong-wu was born in Incheon, South Korea. He is the youngest of two children, with one elder sister. He attended Guwol Middle School, followed by Hanlim Multi Art School, graduating in 2014. He graduated from Dong Seoul University as dance and acting major.[2][3] Ong also danced as a professional dancer as part of several street and B-boy dance teams during this period.[4]

Ong was encouraged by his mother to pick up a musical instrument and started playing the drums after his sister began learning the piano.[5] While playing the drums at a band contest in 2008, Ong was scouted as a trainee by the now-defunct entertainment company Lion Media. However, internal troubles with the company and its eventual closure lead to the delay of his debut, and contractual issues prevented him from signing with other companies for a period of time.[6] In August 2016, he signed as an acting trainee with his current company Fantagio at the recommendation of one of his university professors.[7]


Predebut: Produce 101[edit]

Despite being an acting trainee, Ong was sent as a representative by his company to participate in Produce 101 (season 2) due to his well-rounded skills in singing and dancing.[7] He achieved an 'A' rank in the evaluations, and went on to finished fifth place in the finale with 984,756 votes. As part of the top eleven contestants, he would go on to debut as a member of Wanna One.[1]

Prior to his participation in Produce 101, Ong took part in a short film project Short Film Project: Beginning. The short film, titled Seong-wu Is Alright, was released on June 19, 2017.[8][9] Additionally, he also made a special appearance on the mobile drama Idol Fever, which aired between July 7 to July 17, 2017.[10]

2017–2018: Wanna One[edit]

Ong debuted as a member of the project group Wanna One on August 7, 2017.[11] He went on to represent the group in several appearances on variety shows such as Happy Together, The Return of Superman, and Saturday Night Live Korea.[12][13][14] He also served as a special emcee on music show broadcasts for M Countdown and Inkigayo.[15][16] Ong, together with fellow group mate Kang Daniel, was cast for the pilot episode of the variety show Master Key, and was later confirmed as a fixed cast member.[17] His appearance on the show garnered positive reactions from media outlets, receiving praise for his skilful deception of his cast mates in the psychological game-style show to net the show's biggest win thus far.[18][19]

In November, Ong featured in singer Huh Gak's music video for his digital single "Only You".[20]

In February 2018, Ong was named one of the main emcees of Show! Music Core. He subsequently left his position in September 2018.[21] He also continued appearing on several variety shows. He appeared on Living Together in Empty Room with Kang Daniel and Kim Jae-hwan,[22] and also became a cast member of the reality show Law of the Jungle Sabah, which aired from July 27, 2018 to September 21, 2018.[23]

His contract with Wanna One ended on December 31, 2018, however he continued to appear with the group until its official farewell concerts on January 24–27, 2019.[24]

2019–present: Solo activities[edit]

Upon conclusion of his activities with Wanna One, Ong embarked on his first solo fan-meeting tour, titled "Eternity", in March and April 2019.[25] On March 7, 2019, he was also named PR Ambassador of the Incheon Metropolitan City Office of Education.[26]

As part of Pepsi and Starship Entertainment's 2019 Pepsi K-Pop Collab Project, Ong released the single "Heart Sign".[27] The track was written by producers Flowblow, who penned Wanna One's hit debut single, "Energetic".[28] The music video was released on June 11, 2019.[29]

Ong made his acting debut in the later half of the year, starring as the male lead in JTBC's youth drama At Eighteen, alongside Kim Hyang-gi and Shin Seung-ho.[30] The drama tackles some of the issues faced by youths in South Korea, such as first love, the pressures of school and parental expectation, to topics such as school violence and bullying. Ong played the role of transfer student Choi Jun-woo, who is falsely accused of school violence.[31] He garnered many positive reviews for his emotive acting,[32] and went on to nab several awards for the role, including Best Rookie Award and Hallyu Star Award at the Korea Drama Awards.[33] Ong also recorded the song "Our Story" as part of the official soundtrack for the drama, which was released on August 8, 2019.[34]

In January 2020, Ong kicked off his second solo fan-meeting tour, titled "We Belong". Beginning in South Korea, the tour was set to span cities in several countries including Thailand, Taiwan and the Philippines.[35] The digital single "We Belong" was released on January 9.[36] Intended as a fan-song, Ong participated in both the lyric writing and composition of the single,[37] and performed it on the first time during the Seoul leg of his tour on January 11.[38]

Ong appeared on the second season of travel variety show, Traveler, with fellow actors Ahn Jae-hong and Kang Ha-neul. The variety show focused on the backpacking travels of the trio in Argentina, and began airing starting February 15.[39] He went received much attention for his photography skills on the first episode.[40]

Ong made his comeback as a singer with his first solo album, Layers.[41] The EP was released on March 25,[42] together with lead single, "Gravity".[43] Ong took part in the composition and lyric writing of all the songs on the album, drawing his inspiration from his emotions and stories from the past year.[44]

He also made several appearances on variety shows, including Omniscient Interfering View,[45] as well as Master in the House,[46] Radio Star,[47] and Running Man.[48] He also featured on You Hee-yeol's Sketchbook, performing his new single and displaying his drumming skills on the show's live music format.[49]

Ong collaborated with singer Baek Ji-young on duet, "Didn't Say Anything". The ballad will be released on May 12.[50]

Ong is set to star as the male lead in the JTBC drama Number of Times Friends Become Lovers, alongside Shin Ye-eun and Kim Dong-jun. He will play photographer Lee Soo. The drama airs in the later half of 2020.[51]

Furthermore, Ong will also be making his film debut in the upcoming musical-movie, Life is Beautiful, starring Ryu Seung-ryong and Yum Jung-ah. He is set to play Ryu's younger counterpart in the film. The film goes to theatres later this year.[52]


Extended plays[edit]

Title Album details Peak chart positions Sales
US World
Track listing
  1. Gravity
  2. Café (너를 위한 카페; lit: Café For You)
  3. After Dark (또, 다시 나를 마주한 채; lit: Again, I Look At Myself)
  4. Bye Bye
  5. Guess Who
  6. We Belong


Title Year Peak chart positions Sales Album
"Heart Sign" (Prod. Flow Blow) 2019 N/A Non-album single
"We Belong" (그림자) 2020 Layers
"Gravity" 107
Soundtrack appearances
"Our Story" (우리가 만난 이야기) 2019 N/A At Eighteen OST Part.2
"—" denotes releases that did not chart or were not released in that region.


Title Year Peak chart positions Sales Album
"Didn't Say Anything (아무런 말들도)" (Baek Z Young & Ong Seong-Wu) 2020 81 N/A Non-album single
"—" denotes releases that did not chart or were not released in that region.



Year Title Role Notes
2017 Seong-wu Is Alright Seong-wu Short film
2020 Life Is Beautiful Jung-woo

Television series[edit]

Year Title Role Network Notes Ref.
2017 Idol Fever Himself Naver TV Cast Special appearance (Ep. 1–2) [10]
2019 At Eighteen Choi Jun-woo JTBC Main role [30]
2020 Number of Times Friends Become Lovers Lee Soo JTBC Main role [51]

Variety show[edit]

Year Title Role Network Notes Ref.
2017 Produce 101 (season 2) Contestant Mnet [1]
Master Key Cast member SBS with Kang Daniel [17]
2018 Living Together in Empty Room MBC TV with Kang Daniel and Kim Jae-hwan [22]
Show! Music Core Co-host with Kang Mi-na and Mark Lee [21]
Law of the Jungle Sabah Cast member SBS with Ha Sung-woon [23]
2020 Traveler (season 2) JTBC with Ahn Jae-hong and Kang Ha-neul [39]

Awards and nominations[edit]

Year Award Category Nominated work Result Ref.
2019 12th Korea Drama Awards Best New Actor At Eighteen Won [33][56]
Hallyu Star Award Won
Asia Artist Awards Rookie Actor Award Won [57]
StarNews Popularity Award N/A Nominated [citation needed]
StarHub Night of Stars Most Promising Actor At Eighteen Won [58]
2020 56th Baeksang Arts Awards Best New Actor (TV) Pending [59]


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External links[edit]