郭富城
— Ken Wong
李若彤
— Gloria Chan
Sammo Kam-Bo Hung
— Black Jack Hung
唐文龍
— Rocky Chan
徐濠縈
— Pam
Jun Kunimura
— Japanese Trainer
胡大為
— Traffic Cop
駱達華
— Pang
澤田拳也
— Yamada Motokazu
谷德昭
— Loud Spectator
高志森
— Pao
Alan Mak
— Policeman
陳果
— Policeman
許鞍華
— Teacher
劉國昌
— Fight Official
黃文慧
— Gloria and Rocky's Mother
林道權
— Bo
Wai Gei-Shun
— Guest
羅冠蘭
— Ken's Mother
司徒慧焯
— MC
張炭
— MC
元德
— Ringside Crew
焦媛
— Ken's Sister
陳錦泉
— Boxing Committee Member
陳德興
— Big B / Den
鄒靜
— Loud Spectator's Girlfriend
彭立威
— Loud Spectator's Friend
葉景文
— Keith Wong
藍靖
— Underground Boxer
世雄
— Underground Boxer