Prunella Margaret Rumney West Scales is a retired English actress. She portrayed Sybil Fawlty, the bossy wife of Basil Fawlty, in the BBC comedy Fawlty Towers, Queen Elizabeth II in A Question of Attribution by Alan Bennett and appeared in the documentary series Great Canal Journeys (2014–2021), travelling on narrowboats with her husband, fellow actor Timothy West.

Sybil Fawlty is a fictional character from the BBC sitcom Fawlty Towers. She is played by Prunella Scales. She is listed as 34 years old as seen on her medical chart in the 1975 episode "The Germans", presumably indicating she was born in 1941. Scales was 43 years old when Fawlty Towers began production.