Name	Known for
Laura Fraser Anna Anna See fewer	A Knight's Tale (2001)
Eiry Thomas Louie Louie See fewer	The Bench (2001)
Heledd Gwynn Cat Cat See fewer	The Pact (I) (2021)
Sophie Melville Mandy Mandy See fewer	The Pact (I) (2021)
Gillian Elisa Gwen Gwen See fewer	Sherlock (2010)
Richard Elis Gareth Gareth See fewer	EastEnders (1985)
Abbie Hern Tish Tish See fewer	Enola Holmes 2 (2022)
Julie Hesmondhalgh Nancy Nancy See fewer	Broadchurch (2013)
Ben McGregor DC Griffiths DC Griffiths See fewer	The Tuckers (2020)
Adrian Edmondson Richard Richard See fewer	Bancroft (2017)
Rakie Ayola DS Holland DS Holland See fewer	Been So Long (2018)
Alexandria Riley DC Anford DC Anford See fewer	Torchwood: The Story Continues (2017)
Jason Hughes Max Max See fewer	Midsomer Murders (1997)
Richard Elfyn Dylan Dylan See fewer	Apostle (2018)
Gabrielle Creevy Tamsin Tamsin See fewer	Three Women (2023)
Aled ap Steffan Ryan Ryan See fewer	Gangs of London (2020)
Geraint Wyn Todd Chris Skinner (as Geraint Todd) Chris Skinner (as Geraint Todd) See fewer	Itopia (2022)
Aneurin Barnard Jack Jack See fewer	Dunkirk (2017)
Kate Morgan-Jones Steff (as Kate Morgan Jones) Steff (as Kate Morgan Jones) See fewer	Translations (2023)
Elin Phillips Rose Rose See fewer	Itopia (2022)
Owain Gunn Harri Harri See fewer	The Pact (I) (2021)