林允

Mermaid Shan

邓超

Liu Xuan

张雨绮

Ruolan

Show Lo

Brother Eight

徐克

Uncle Rich

Wen Zhang

Constable Mo

Kris Wu

Long Jianfei

Lee Sheung-Ching

Constable Shi

Lu Zhengyu

Mr. Liao

趙志淩

Mermaid Long

Gao Shuang

Liu Xuan's Bodyguard

松岡李那

George's Assistant

夏尉喻

Mermaid

徐軫軫

George's Assistant

白客

Museum Visitor

Kong Lian-Shun

Museum Visitor

田啟文

Museum Visitor

錢國偉

Mermaid Fat

林子聰

Technician

范淑珍

Mermaid Shitai

Ivan Kotik

Dr. George

Pierre Bourdaud

Auctioneer

Yang Neng

Curator

孫嘉靈

Courier

李叶青

Ruo-Lan's Assistant

Kabby Hui

Reporter

曾漪莲

Office Lady

Zhou Shuai

Party Guest

Zhao Fanghua

Party Guest

张爱钦

Bald Merman

八兩金

(Voice)

宁小花

"Chicken King" [BBQ chicken stall boss]

张志涵

Gunner

张效铭

Mermaid