Natasia Charlotte Demetriou is an English actress, comedian, and screenwriter. She is best known for her roles as Nadja in the FX comedy horror series What We Do in the Shadows (2019–present) and Sophie in the Channel 4 sitcom Stath Lets Flats (2018–2021).
In 2022, Demetriou co-wrote and starred in the BBC sketch show Ellie & Natasia, alongside her comedy partner Ellie White. The show was renewed for a second series in 2023.