Fiona Sit
- Birthday: 8/11/1981
- Place of birth: Hong Kong, British Crown Colony [now China]
- Fame for: Acting
- Also known as: 薛凱琪, 薛凯琪, Fiona Sit Hoi-kei, Xuē Kǎiqí, Sit Hóikèih
- Social networks: Instagram
Biography
Fiona Sit (Chinese: 薛凱琪, born 11 August 1981) is a Hong Kong singer and actress.