Jennifer "Gemma" Jones (born 4 December 1942) is an English actress. Appearing on both stage and screen, her film appearances include Sense and Sensibility (1995), the Bridget Jones series (2001–2016), the Harry Potter series (2002–2011), You Will Meet a Tall Dark Stranger (2010), and Ammonite (2020).

For her role in the BBC television film Marvellous (2014), she won the 2015 BAFTA TV Award for Best Supporting Actress. Her other roles on television include Rainbow City (1967), The Duchess of Duke Street (1976–1977), Trial and Retribution (2003–2008), Spooks (2007–2008), Teacup Travels (2015–2017), Diana and I (2017), and Gentleman Jack (2019).

Early life
Jones was born in Marylebone, the daughter of Irene (née Isaac; 1911–1985) and Griffith Jones, an actor (1909–2007). Her brother Nicholas Jones is also an actor. She attended the Royal Academy of Dramatic Art, where she won the gold medal.