Johnnie To Director Johnny Hallyday Costello Actor Sylvie Testud Irene Thompson Actor Anthony Chau-Sang Wong Kwai Actor Ka Tung Lam Chu Actor Suet Lam Fat Lok Actor Simon Yam George Fung Actor Siu-Fai Cheung Wolf Actor Felix Wong Python Actor Maggie Siu Madam Wong Actor Vincent Sze Mr. Thompson Actor Ting Yip Ng Crow Actor Ka-Fai Wai Screenwriter John Chong Producer Peter Lam Producer Laurent Pétin Producer Michèle Pétin Producer Ta-Yu Lo Original Music Cheng Siu-Keung Cinematographer Hung Mo To Cinematographer David M. Richardson Film Editing