Sarah Wynter (born 15 February 1973) is an Australian actress, known for her roles on American television – such as Kate Warner on the television drama 24, as Beth on Windfall, and as Keitha on Flight of the Conchords.

Early life
Wynter was born in Newcastle, New South Wales, the daughter of Helen Cummings, a worker in the Newcastle registry of the Family Court of Australia and lately author, and Stuart Wynter, a physician.

Her grandmother, Joy Cummings, was the Lord Mayor of Newcastle – Australia's first female Lord Mayor. In 1984, her father killed his second wife and Sarah's half-sister before killing himself.