ActorPrain TPC
Oh Jung-se
Oh Jung-se (오정세), born February 26, 1977 in Uiryeong County, South Gyeongsang Province, is a South Korean actor known for inhabiting deeply unusual characters without sacrificing their humanity. He studied journalism at Sun Moon University before committing fully to theater, where he built over a decade of stage work before moving to film and television.
His breakthrough came with the 2018 musical film Swing Kids (opposite Do Kyung-soo), followed by roles that expanded his dramatic range. His most internationally recognized performance came in tvN's It Is Okay to Not Be Okay (2020), where he played Moon Sang-tae, a man with autism spectrum disorder whose relationship with his brother anchored the series. The role won him the Baeksang Arts Award for Best Supporting Actor in 2021. He then won the same prize again in 2022 for the period thriller Uncle, making him one of a very small group of performers to take consecutive Baeksang supporting awards. Revenant (2023) alongside Kim Tae-ri added another dimension, playing folklore professor Yeom Hae-sang with quiet authority. Mr. Plankton (2024) demonstrated his capacity to carry a lead role, blending dark comedy and emotional depth. In 2025, he starred in the KBS-Disney+ crime drama Good Boy and the theatrical film Hi-Five. He appears in a supporting role in Climax (2026) on ENA and Disney+.
He is represented by Prain TPC and maintains no official personal social media presence.
1 articles8 creditsDebut: January 1, 2001South Korean
Gallery
Oh Jung-se at a press event, November 2024 (TV10, CC BY 3.0)
Filmography
2026
ClimaxK-Drama
Supporting
2025
Good BoyK-Drama
Lead
2025
Hi-FiveFilm
Supporting
2024
Mr. PlanktonK-Drama
Eo Heung
2023
RevenantK-Drama
Yeom Hae-sang
2021
UncleK-Drama
Lead
2020
It Is Okay to Not Be OkayK-Drama
Moon Sang-tae
2018
Swing KidsFilm
Supporting
Fans Also Ask
Who does Oh Jung-se play in It Is Okay to Not Be Okay?
Oh Jung-se plays Moon Sang-tae, a man with autism spectrum disorder whose deep bond with his younger brother anchors the series. The role earned him the 57th Baeksang Arts Award for Best Supporting Actor in Television in 2021, bringing mainstream recognition after over a decade of theater and film supporting roles.
Has Oh Jung-se won any major awards?
Yes. He won back-to-back Baeksang Arts Awards for Best Supporting Actor in Television in 2021 for It Is Okay to Not Be Okay and in 2022 for Uncle, making him one of very few performers to take consecutive wins in the same Baeksang category. He also holds a Grand Bell Award for Best Supporting Actor and multiple KBS Drama Awards.
Who is Oh Jung-se married to?
Oh Jung-se married An Hee-seon, his first love from elementary school, after 19 years together. They married in 2006 and have one daughter, Oh Si-yeon. He has spoken candidly about the relationship in interviews, describing their real-life story as more touching than any drama role he has ever played.
What are Oh Jung-se's most recent dramas?
His recent credits include Mr. Plankton (2024, KBS) where he played the lead Eo Heung with darkly comedic precision. In 2025 he starred in the KBS-Disney+ crime drama Good Boy and appeared in the theatrical film Hi-Five. He takes a supporting role in Climax (2026) on ENA and Disney+.
Where did Oh Jung-se study before acting?
Oh Jung-se studied journalism at Sun Moon University before committing fully to theater, building more than a decade of stage experience. That foundation shapes the precision he brings to unconventional characters, enabling him to find quiet humanity in roles that lesser-trained performers might flatten into caricature.
