Actor

Koo Ja-sung

Koo Ja-sung is credited on 5 TV shows, best known by TMDB votes for The Secret Life of My Secretary, Misty and Was It Love?.

Born September 22, 1992.

Filmography · 5 titles

US streaming apps shown under each title, checked October 7, 2026. Tap any title for where it streams and what it costs.

The Secret Life of My Secretary
2019 · TV show
On Netflix and Rakuten Viki
Misty
2018 · TV show
On Netflix and OnDemandKorea
Was It Love?
2020 · TV show
On Netflix
Motel California
2025 · TV show
On Rakuten Viki
Genesis
2021 · TV show
Not on a US subscription app

About Koo Ja-sung

Goo Ja Sung is a South Korean actor and model. He made his acting debut in 2007. He has appeared in various dramas since his debut including, “Misty” (2018) and “The Secret Life of My Secretary” (2019).

Biography from TMDB, written by its community.