Oh Eui-sik

Oh Eui-sik is a South Korean actor who started in musicals and theatre and became a familiar, friendly face on television. He is known for playing kind teachers, loyal friends and funny brothers. Global fans know him from True Beauty (2020), Once Again (2020) and Big Mouth (2022).

Oh Eui-sik is 177 cm (5 ft 10 in) tall and weighs 67 kg, according to his published profile.

Early life

Oh Eui-sik was born on November 1, 1983, in South Korea. He grew up loving music and the stage, and he plays the guitar well. He made his musical debut in 2006 in a children's musical and then acted in plays and musicals for years, building strong skills in comedy, singing and live performance.

Career and breakthrough

Television slowly opened its doors with roles in Oh My Ghost (2015) and Love in the Moonlight (2016). His name became widely known with Hi Bye, Mama! (2020) and the long family hit Once Again (2020), where he played Oh Jung-bong across one hundred episodes. In While You Were Sleeping (2017), he played reporter Bong Doo-hyeon, adding warmth to the courtroom story.

Popular roles

In True Beauty (2020), Oh Eui-sik plays Han Joon-woo, the gentle literature teacher who supports his students with patience and humour. In Big Mouth (2022), he plays Kim Soontae, the hero's loyal friend and helper. In The First Responders (2022), he plays Kang Do-ha, showing a more serious side inside the emergency rescue team.

Recent work and why fans love him

He joined Happy Anding (2026) as the hero's older brother and the hit Bon Appétit, Your Majesty (2025). Fans love Oh Eui-sik because he feels like a good friend you have known for years. His acting is natural and kind, and he brings light into serious stories without ever breaking their mood.