The Viral Factor

Jay Chou

Jon

Nicholas Tse Ting-Fung

Man Yeung

Lin Peng

Rachel

Michelle Bai

Ice

Andy On Chi-Kit

Sean

Liu Kai-Chi

Man Tin

Carl Ng Ka-Lung

Ross

Sammy Hung Tin-Chiu

Mark

Philip Keung Ho-Man

Russell

Crystal Lee

Champ

Elaine Jin Yan-Ling

Jon's Mother

Deep Ng Ho-Hong

Man Yeung's Former Partner

Zhang Ran

Wang Xiaojie

Jess Teong

Rachel's Mother

Thomas Cheung Kwok-Leung

Russell's Henchman