Song Kang-ho

Dong-jin

송강호

신하균

Ryu

Bae Doo-na

Yeong-mi

배두나

임지은

Sister

한보배

Yu-Sun

이대연

Detective Choi

Ki Joo-bong

Engineer Peng

기주봉

김세동

CEO

이윤미

Boss

류승범

Person with Cerebral Palsy

지대한

Detective Ji

Heo Jong-su

Detective Heo

Nam Byung-hoon

Man 1

박재웅

Man 2

Jeong Gyu-su

Doctor 1

정규수

Lee Jeong-wook

Doctor 2

이금희

Radio DJ

류승완

Chinese Delivery Man

이칸희

Dong-jin's Ex-wife

Jung Jae-young

Husband of Dong-jin's Ex-wife

정재영

정우식

Teen

김익태

Laborer 1

Oh Kwang-rok

Laborer 2

오광록

신정근

Laborer 3

이계영

Laborer 4

최아라

Boss's daughter

Park Chan-Wook

Bus Passenger (uncredited)

박찬욱