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 kind teachers, loyal friends, and funny brothers. Global fans know him from True Beauty (2020), Once Again (2020), and Big Mouth (2022).

He is 177 cm tall, weighs 67 kg, and works with Highzium Studio.

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.

Career and breakthrough

Television opened its doors slowly, with roles in Oh My Ghost (2015) and Love in the Moonlight (2016). He 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.

Popular roles

In True Beauty (2020), he 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, a more serious role in the 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 him because he feels like a good friend you have known for years, bringing light into serious stories without breaking their mood.