Louis Koo

Sze-To Bo

Aaron Kwok Fu-Shing

Tony

Cherrie Ying Choi-Yi

Mona

Tony Leung Ka-fai

Lee Kong

Cheung Siu-fai

Boss Savage

Jordan Chan Siu-Chun

Mona's Agent

Lo Hoi-Pang

Master Cheng

Calvin Choi Yat-Chi

Jing

Jack Kao

Mona's Father

Hung Wai-Leung

Arcade Player (uncredited)

Lu Ching-Ting

Savage's Runner (uncredited)

Ronald Yan Mau-Keung

Sze-To's Boss

Yuen Bun

Sze-To's Boss (uncredited)

Ho Sai-Man

Fatty

Well Chin Wing-Wai

Club Customer

Li Haitao

Club Saxophonist

Jimmy Wong Wah-Wo

Taxi Driver (uncredited)

Lee Long-Ming

Gambler

Wing Chung

Judoist

Kary Ma Ho-Yee

Judoist

Kelly Lau Miu-Kei

Judoist

Kwok Yue-Kin

Judoist

Tsang Tak-Ming

Judoist

Robin Wan Kam-Fai

Judoist

Joe Lee Nim-Cho

Judoist

Tai Bo

Judoist

Tsui Ka-Ho

Judoist

Kwok Pak-Yin

Judoist

Yeung Fan

Judoist

Cheung Wai-Kit

Judoist