- Michael Hui as Chiu Man (aka Little Mouse Chiu)
- Kenny Bee as Kwok Sing (aka Sing Sir)
- Sammo Hung as Hung Tin Nam
Supporting cast:
- Stanley Fung as Chiu Kin (aka Brother Chiu)
- Deannie Yip as Ah Mei
- Wong Mei-mei as Ching Ching
- Billy Lau as Mr Cheung Yau Wah (aka Wah Chai Yee)
- Teddy Robin Kwan as Wah Chai Yee's assistant
- Lam Wai as Uncle Ho