All of a Sudden
DVD Cover
Traditional Chinese	驚變
Simplified Chinese	惊变
Hanyu Pinyin	Jīng Biàn
Jyutping	Ging1 Bin3
Directed by	Herman Yau
Screenplay by	Chau Ting
Story by	Nam Yin
Produced by	Nam Yin
Starring	Simon Yam Irene Wan Alfred Cheung Dayo Wong
Cinematography	Puccini Yu Sander Lee Paul Yip Stephen Poon
Edited by	Chan Kei-hop
Music by	Mak Chun Hung
Production company	Nam Yin Production
Distributed by	Mandarin Films Distribution Co. Ltd.
Release date	14 June 1996 (1996-06-14)
Running time	97 minutes
Country	Hong Kong
Language	Cantonese
Box office	HK$7,533,230

All of a Sudden is a 1996 Hong Kong crime mystery film directed by Herman Yau and starring Simon Yam and Irene Wan.

Plot

An erotic mystery about a widower who seeks revenge against the man who had an affair with the widower's wife before her apparent suicide. However, things soon turn complicated when the widower begins a relationship with the man's wife.

Cast and roles

• Simon Yam as Tsui Chin-tung
• Irene Wan as Lam Ho-yee
• Alfred Cheung as Lam Kwok-chiu
• Dayo Wong as Detective Guy Mak
• Peter Ngo as Bill Chan
• Tsang yin as Stella Tsui
• Lam Chiu-wing as Drunk driver
• Rico Chung as Driver in accident
• William Leung as Ming
• Lee Chi-kei as Solicitor Chan
• Joe Chu as Lam Kwok-choi's hired thug
• James Tsim
• Stephen Poon
• Kerrick Wong as Hard Rock Cafe staff
• Fong Yue as Sister Sam
• Wong Ka-on as Baby Lam
• Tam Wing-san as Uncle Wong
• Lo Hung as Security guard
• Mak On-luk as Policewoman