Ok Ja-yeon
Ok Ja-yeon (옥자연) is a South Korean actress with Media Lab SISO, best known as Baek Hyang-hui in The Uncanny Counter and Hyun Joo-hee in Big Mouth.
Beyond the screen.
Ok Ja-yeon is a South Korean actress known for intense and intelligent performances. She often plays strong women, from a frightening villain in The Uncanny Counter (2020) to a mysterious hospital director in Big Mouth (2022).
Ok Ja-yeon is 170 cm (5 ft 7 in) tall, according to her published profile.
Early life
She was born on December 19, 1988, in Suncheon, South Korea. She studied aesthetics at Seoul National University before choosing acting.
Career and breakthrough
She began acting on stage and moved into films with Burning (2018) and Ashfall (2019). Her TV breakthrough came with The Uncanny Counter, where she played Baek Hyang-hui, a woman taken over by an evil spirit.
Popular roles
In Big Mouth, she plays Hyun Joo-hee, the calm director of a hospital with dangerous secrets. In Gyeongseong Creature (2023), she played Na Young-choon in the dark historical story.
Recent work
She took a key role in the mystery drama Nine Puzzles (2025). Ok Ja-yeon is now trusted with complex and dark characters, and fans love the way she makes even silence feel full of meaning.
A career, chapter by chapter.
Selected drama roles
- Big Mouth — Hyeon Joohee
- The Uncanny Counter — Baek Hyang-hui
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Stories to find them in.
Selected credits in the Oxfea collection.
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