Oh Se-young (오세영) is a South Korean actress born on July 21, 1996, in Seoul. A graduate of Chung-Ang University, she began her career in 2015 and gained her first experience in both film and theater before shifting her focus more toward TV dramas.
She gradually began to gain recognition starting in 2018 thanks to The Beauty Inside, in which she plays Joo Ga-young. She then appeared in several web dramas, including Your Imagination Becomes Reality, Dating Class and Cat’s Bar. In 2019, she also joined the cast of VIP as Han So-mi.
After an appearance in Alice, she plays Jo Hye-jin in Thirty-Nine and appears in the thriller Blind in 2022. Her career took a new turn in 2023 when she landed one of the lead roles in The Third Marriage. In the series, she plays Kang Se-ran for over 100 episodes, a performance that brought her greater recognition and an award at the MBC Drama Awards.
In 2024, she joined the very popular Lovely Runner as Choi Ga-hyeon, Kim Tae-sung's ex-girlfriend. She went on to make appearances in 2025 in Pine and The Murky Stream.
In 2026, Oh Se-young plays Yoo Se-hee in The Judge Returns, before landing the lead role in Lee Eun-chae in What a Boss Wants.
Appearing in everything from daily soap operas to romances, thrillers, and web dramas, Oh Se-young has gradually moved from small roles to leading roles, thanks in large part to The Third Marriage.
