Nancy Sit Ka-yin MH (Chinese: 薛家燕; born 30 March 1950) is a Hong Kong actress on the TVB network.

Sit recorded many albums in her teens, and later served as a mentor to Anita Mui, who went on to become one of the biggest superstars in Hong Kong history.

In this film, she plays the brief and touching role of a young mother which sacrifices herself to save the life of her son Yoko (Day Golo) from a gangster band.

She also visited several countries, including Singapore and Malaysia, to promote shows in which she performed such as A Kindred Spirit and to host the Channel U variety special.

Sit's address has been leaked after her Mid-Levels apartment was among the developments that were locked down by the Hong Kong Government on March 13, 2021, in a bid to contain a new COVID-19 outbreak.