Jennifer Tse Ting-Ting. Jennifer Tse Ting-Ting was 32 in Knock Knock Who's There as 'Yan'.
Kate Tsui Tsz-Shan. Kate Tsui Tsz-Shan was 36 in Knock Knock Who's There as 'Shou Yung'.
Annie Liu Xin-You. Annie Liu Xin-You was 34 in Knock Knock Who's There as 'Isabella'.
BabyJohn Choi Hon-Yik. BabyJohn Choi Hon-Yik was 28 in Knock Knock Who's There as 'Roy'.
Simon Lui Yu-Yeung. Simon Lui Yu-Yeung was 51 in Knock Knock Who's There as 'Florist'.
Carrie Ng Ka-Lai. Carrie Ng Ka-Lai was 51 in Knock Knock Who's There as 'Florist Boss'.
Eric Kwok Wai-Leung. Eric Kwok Wai-Leung was 41 in Knock Knock Who's There as 'Market Sun'.
Sam Leung Kin-Ping. Sam Leung Kin-Ping was 55 in Knock Knock Who's There as 'Uncle Yi'.
Violet Lee Ying. Violet Lee Ying was 62 in Knock Knock Who's There as 'Isabella's Mother'.
Cheng Chu-Fung. Cheng Chu-Fung was 61 in Knock Knock Who's There as 'Funeral Home Staff'.
Ruth Tsang. Ruth Tsang was 46 in Knock Knock Who's There as 'Funeral Home Staff'.Carrie Ng Ka-Lai. Carrie Ng Ka-Lai was 51 in Knock Knock Who's There as 'Director'
Paco Yick Tin-Hung. Paco Yick Tin-Hung was >> in Knock Knock Who's There as 'Action Director'
Frankie Tam Gong-Yuen. Frankie Tam Gong-Yuen was >> in Knock Knock Who's There as 'Writer'Jimmy Cheng Man-Ho. Jimmy Cheng Man-Ho was >> in Knock Knock Who's There as 'Writer'Link Ling San. Link Ling San was >> in Knock Knock Who's There as 'Writer'Kom Chun-Yu. Kom Chun-Yu was >> in Knock Knock Who's There as 'Assistant Script'
Venus Wong
Rebecca Zhu
Carlos Chan
Anne Heung Hoi-Lam
Cheng Ka-Sang