小生夢驚魂

Chow Yun-fat
Inspector Chow

Eric Tsang
Halley Tsang Hsiao Wei

Emily Chu Bo-Yee
Alice

Wu Fung
Dr Hu

Michael Miu
David Miu Dai Wai

Phillip Ko
Inspector Chow's man

Yuen Wah
Hua

Anita Mui
May/Mui

Wu Ma
Vampire Hunter

Rico Chu

Mai Kei
Robber

Joh Yin-Ling
David's girlfriend

Huang Ha
Robber's Dai Lo

Tam Chuen-Hing
Doctor Tan

Alan Chan Kwok-Kuen
Cop at identification parade

Margie Tsang Wah-Sin
Mandy

Billy Ching Sau-Yat
Billy

Shirley Kwan Suet-Lai
Female vampire

Anna Ueyama
Cindy

Sandra Ng Kwun-Yu
Judy

Si-Ma Yin
Janice

Stuart Yung Sai-Kit
May's Boyfriend