Sian Reese-Williams on her latest series Still Waters, the reality of a career on screen, and the quirks of playing Margaret Thatcher

Sian Reese-Williams is a constant presence in the world of British and Welsh-language dark drama, from her lead role on the internationally successful crime noir series Craith/Hidden to her new spinoff of the mystery Y Golau/The Light in the Hall, titled Y Golau: Dŵr/Still Waters, which sees her character from season one take a personal interest in an unresolved mystery that has haunted the region for years. She's done many wonderful projects, but aside from her beloved role as Detective Cadi, her absolutely brilliant (and hilarious) performance as Margaret Thatcher in the historical drama Y Sŵn remains a favorite. Sian has been through the many ups and downs that define a long career in film and television, and it was wonderful diving into the details of her work together.Y Golau / The Light in the HallTrailer: Season 1Streaming: Amazon | Apple | AMC | Acorn TVCraith / HiddenTrailer: Season 1 | Season 2 | Season 3Streaming: Amazon | Acorn TV | Apple35 Diwrnod / 35 DaysTrailer: Season 3Streaming: Amazon | Britbox | RokuWolfTrailer: Season 1Streaming: HBO Max | Apple | Amazon | BBCY Gwyll / HinterlandTrailer: Season 3Streaming: Acorn TV | Amazon | AppleY Sŵn / The SoundTrailer: BilingualStreaming: BBCOtherCheck out Sian's ceramics at SianyPots