Koo Ja Sung

Name: Koo Ja Sung
Native name: 구자성
Nationality: South Korean
Gender: Male
Born: September 22, 1992
Age: 32

Goo Ja Sung is a South Korean actor and model. He was born September 22, 1992 and 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).

(Viki) Edit Biography

Year	Title	#	Role	Rating
2025	Motel California Korean Drama, 2025, 12 eps Cha Seung Eon (Support Role)	12	Cha Seung Eon Support Role	7.3
2022	Sponsor Korean Drama, 2022, 12 eps Hyun Seung Hoon (Main Role)	12	Hyun Seung Hoon Main Role	6.2
2021	Genesis Korean Drama, 2021, 6 eps Kim Min Ki [Il Hoon's secretary] (Support Role)	6	Kim Min Ki [Il Hoon's secretary] Support Role	6.8
2020	Was It Love? Korean Drama, 2020, 16 eps Oh Yun Woo (Main Role)	16	Oh Yun Woo Main Role	7.3
2019	The Secret Life of My Secretary Korean Drama, 2019, 32 eps Ki Dae Joo (Main Role)	32	Ki Dae Joo Main Role	8.0
2018	Work & Love Balance Korean Drama, 2018, 3 eps Han Geon Woo (Main Role)	3	Han Geon Woo Main Role	6.7
2018	Room No. 9 Korean Drama, 2018, 16 eps [Policeman] (Ep.2) (Guest Role)	16	[Policeman] (Ep.2) Guest Role	7.7
2018	Misty Korean Drama, 2018, 16 eps Kwak Ki Seok [Junior reporter] (Support Role)	16	Kwak Ki Seok [Junior reporter] Support Role	8.2

Year	Title	Role	Rating
2007	Milky Way Liberation Front Korean Movie, 2007, subway passenger (Guest Role)	subway passenger Guest Role	5.9

Year	Title	#	Role	Rating
2021	Drama Special Season 12: TV Cinema - Siren Korean Special, 2021, 1 eps Park Dong Gyu (Main Role)	1	Park Dong Gyu Main Role	7.0

Year	Title	#	Role	Rating
2018	Problem Child in House Korean TV Show, 2018, 260 eps (Ep. 167) (Guest)	260	(Ep. 167) Guest	7.8
2018	Dunia: Into A New World Korean TV Show, 2018, 15 eps (Regular Member)	15	Regular Member	7.3
2015	Knowing Bros Korean TV Show, 2015, 500 eps (Ep. 237) (Guest)	500	(Ep. 237) Guest	8.7