- Country: South Korea
- Genres: Comedy, Thriller
- Release: 2010-04-08
- Director: Dong-wook Kim
- Writers: N/A
- Language: Korean
- Stars: Dong-wook Kim , Shim Eun-kyung , Seong-sik Han , Ji-ru Sung , Oh-seong Yu , Wok-suk Song
- Runtime: 106 min
- Awards: 2 nominations
- AKA: ダブル捜査線 (Japan) , Happy Killers , Ban-ga-woon sal-in-ja , Bangawoon salinja (Korea) , Happy Murderer , Happy Killers (United Kingdom) , Hello Murderer (United States of America) , Happy Killers (United States of America) , Ban-ga-woon sal-in-ja (Korea)
- Plot: An unemployed man and a less than exemplary detective clash while trying to catch a serial killer.
- IMDB:tt1867984
Happy Killers Cast · · · ALL
Dong-wook Kim
Director
Dong-wook Kim
Det. Jeong-Min
Oh-seong Yu
Young-Suk
Eung-soo Kim
(I)
Captain
Shim Eun-kyung
Kim Ha-Rin
Mi-do Lee
Squid
Song Ok-suk
Choi Jung-min's mother