Gwyneth Anjuli Keyworth (born 15 September 1990) is a Welsh actress of stage and screen. She is known for her roles in the TV series The Sarah Jane Adventures, Misfits (2009–2013), The Great Outdoors, and Death Valley (2025).
Early life and education Gwyneth Anjuli Keyworth was born on 15 September 1990 in Aberystwyth.
She began acting in a local Welsh language youth theatre group and graduated from the Welsh-language, community comprehensive school Ysgol Gyfun Gymunedol Penweddig.
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.
She graduated from the Royal Academy of Dramatic Art in 2014 with a BA in Acting (Honours).
Career Screen Keyworth is perhaps best known for her roles on British TV programmes, including The Sarah Jane Adventures, Misfits (2009–2013),The Great Outdoors, and Death Valley (2025). 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.
Stage 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.
Personal life Keyworth is neurodivergent having been diagnosed with ADHD around 2024. Due to her undiagnosed ADHD she found school particularly challenging, but discovering that she had ADHD made her feel "so lucky" she found a career in acting. Her diagnosis actually aided her in identifying with the neurodivergent detective Janie Mallowan, the starring role she plays in Death Valley.
Filmography
Television YearTitleRoleNotes2009FramedMarie HugesTV film2010Royal WeddingTammy CraddockTV filmThe Great OutdoorsHazel Stephens3 episodesThe Sarah Jane AdventuresEmily Morris2 episodes: "Lost in Time: Parts 1 & 2"2010–2011MisfitsMarnie2 episodes (including internet mini-episode "Vegas Baby!")2011Midsomer MurdersBethanEpisode: "Death in the Slow Lane"Case HistoriesReggie Teague2 episodes: "When Will There Be Good News: Parts 1 & 2" 2012LoservilleLauraTV film2014Vodka DiariesPerielOne of the comedies in the BBC Comedy Feeds TV seriesThe Suspicions of Mr Whicher: The Ties That BindEmma FinchTV film2015Game of ThronesCleaEpisode: "High Sparrow"2016Doctor ThorneLady Augusta Gresham3 episodesPlebsAgathaEpisode: "The Crime Wave"Power MonkeysJackieTV mini-series. Main roleWastedAlisonMain roleY Gwyll / HinterlandBeca JonesSeries 3, episode 12017BangEla4 episodesBlack MirrorNicolaEpisode: "Hang the DJ"2018Craith / HiddenMegan Ruddock8 episodes2018–2019Defending the GuiltyDanielle7 episodes2019The CrownGwen EdwardsSeason 3, episode 3 "Aberfan"2020The Trouble with Maggie ColeBecka Cole6 episodes2021Alex RiderEvelyn Anders6 episodes2024Lost Boys and FairiesBecky3 episodes2025–2026Death ValleyJanie MallowanLead role
Film YearTitleRoleNotes2010CopierStaceyShort. Directed by Jessica Levick.JerusalemAngelShort. Directed by Ryan Andrews.2011Little MunchkinMargaretShort. Directed by Ryan Andrews.2012Elfie HopkinsRuby GammonDirected by Ryan Andrews.2014Closer to the MoonLidiaDirected by Nae Caranfil.7.2MarShort. Directed by Nida Manzoor.2017The Master of YorkChanaShort. Directed by Kieron Quirke.2021ContrabandRubyShort. Directed by Anabel Barnston.The TollThe TripletsWelsh black comedy crime film. Directed by Ryan Andrew Hooper2022Safe WordGirlShort. Directed by Ellie Heydon.2024SatisfactionVerityShort. Directed by Tom Bailey.
Awards and nominations 2018 BAFTA Cymru Award – Best Actress (Yr Actores Orau): Nomination 2023 WhatsOnStage Award – Best Supporting Performer in a Play 2025 BAFTA Cymru Award – Best Actress (Yr Actores Orau): Nomination
References
External links
Gwyneth Keyworth's CV at the Curtis Brown agency