Margaret Cheung Man-yuk (Chinese: 張曼玉; pinyin: Zhāng Mànyù; born 20 September 1964) is a former Hong Kong actress. Raised in Hong Kong and Britain, she started her career after placing second in 1983's Miss Hong Kong Pageant. She achieved critical success in the late 1980s and into the early 2000s, before taking a break from acting following her last starring role in 2004. She rarely makes public appearances except for fashion events and award ceremonies.

Green Snake is about a mischievous snake (Maggie Cheung) who assumes human form interferes with the romance between her reptilian sister (Joey Wang) and a hapless man (Wu Hsing-kuo).