Gwyneth Keyworth

• Birth Name — Gwyneth Anjuli Keyworth • Born — 15 September 1990 • Birthplace — Aberystwyth, Ceredigion, Wales • Alma Mater — Royal Academy of Dramatic Art (BA Hons) • Occupation — Actress • Years Active — 2008–present Gwyneth Anjuli Keyworth (born 15 September 1990) is a Welsh actress.

Keyworth was born in Aberystwyth. She began acting in a local Welsh language youth theatre group. In 2008, she appeared in Sick Room, an ensemble production at the Soho Theatre with the National Youth Theatre. In 2010, Keyworth was recognised as a Screen International Star of Tomorrow. In 2011, she appeared in an episode of Midsomer Murders. She graduated from the Royal Academy of Dramatic Art in 2014 with a BA in Acting (Honours).

Keyworth is perhaps best known for her roles on British TV programmes, including The Sarah Jane Adventures, Death Valley, The Great Outdoors, and Misfits. She has had film roles, including the 2012 cannibal horror thriller Elfie Hopkins and the 2014 comedy-drama Closer to the Moon. In 2014, she starred in The Vodka Diaries, in 2015, she played Clea in Season 5 of the HBO series Game of Thrones, and in 2021, appeared in the black comedy The Toll.

Keyworth's stage roles include the 2015 Shakespeare's Globe production of Helen Edmundson's The Heresy of Love, and a production of Little Shop of Horrors. In 2022, she starred in a production of To Kill a Mockingbird at the Gielgud Theatre in London. Her portrayal of Scout led her to winning the Best Supporting Performer in a Play at the 2023 WhatsOnStage Awards. In 2025, she played Viola in the Royal Shakespeare Company production of Twelfth Night. She has also appeared in As You Like It at Shakespeare's Globe, The Life and Times of Fanny Hill at the Bristol Old Vic, and Raising Martha at the Park Theatre.

• Year — Title — Role — Notes • 2009 — Framed — Marie Huges — TV film • 2010 — Royal Wedding — Tammy Craddock — TV film • The Great Outdoors — Hazel Stephens — 3 episodes • The Sarah Jane Adventures — Emily Morris — 2 episodes: "Lost in Time: Parts 1 & 2" • 2010–2011 — Misfits — Marnie — 2 episodes (including internet mini-episode "Vegas Baby!") • 2011 — Midsomer Murders — Bethan — Episode: "Death in the Slow Lane" • Case Histories — Reggie Teague — 2 episodes: "When Will There Be Good News: Parts 1 & 2" • 2012 — Loserville — Laura — TV film • 2014 — Vodka Diaries — Periel — One of the comedies in the BBC Comedy Feeds TV series • The Suspicions of Mr Whicher: The Ties That Bind — Emma Finch — TV film • 2015 — Game of Thrones — Clea — Episode: "High Sparrow" • 2016 — Doctor Thorne — Lady Augusta Gresham — 3 episodes • Plebs — Agatha — Episode: "The Crime Wave" • Power Monkeys — Jackie — TV mini-series. Main role • Wasted — Alison — Main role • Y Gwyll / Hinterland — Beca Jones — Series 3, episode 1 • 2017 — Bang — Ela — 4 episodes • Black Mirror — Nicola — Episode: "Hang the DJ" • 2018 — Craith / Hidden — Megan Ruddock — 8 episodes • 2018–2019 — Defending the Guilty — Danielle — 7 episodes • 2019 — The Crown — Gwen Edwards — Season 3, episode 3 "Aberfan" • 2020 — The Trouble with Maggie Cole — Becka Cole — 6 episodes • 2021 — Alex Rider — Evelyn Anders — 6 episodes • 2024 — Lost Boys and Fairies — Becky — 3 episodes • 2025–2026 — Death Valley — Janie Mallowan — Lead role