Ringo Lam Director Shu Qi Grace Actor Andy On Alex Actor Yat Ning Chan Joey Actor Simon Yam Poon Actor Ruby Wong Poon's Girlfriend Actor David Wu Dai-Wai Richard Actor Ho-Yin Wong Vincent Actor Shiu Hung Hui Teddy Actor Mike Cassey Screenwriter Johnnie To Producer Ross W. Clarkson Cinematographer David M. Richardson Film Editing Roger Wang Original Music