Ruth Alexandra Elisabeth Jones (born 22 September 1966) is a Welsh actress, comedian, writer and producer. She co-wrote and co-starred in the critically acclaimed BBC sitcom Gavin & Stacey (2007–2010, 2019, 2024), for which she won the BAFTA Award for Best Female Comedy Performance in 2025. She also co-wrote and starred in the Sky One comedy-drama Stella (2012–2017), for which she was nominated for the BAFTA Award for Best Female Comedy Performance and the BAFTA Cymru Award for Best Screenwriter.