Name	Known for
Iwan Rheon Joe Joe See fewer	Game of Thrones (2011)
Alexandra Roach Cat Cat See fewer	Anna Karenina (I) (2012)
Joanna Scanlan Sharon Sharon See fewer	Notes on a Scandal (2006)
Annes Elwy Greta Greta See fewer	Little Women (2017)
Aneirin Hughes Gafyn Gafyn See fewer	Cameleon (1997)
Catherine Ayers Sali Sali See fewer	Keeping Faith (2017)
Rhian Blythe Shelley Shelley See fewer	Gwaith/Cartref (2011)
Ioan Hefin DCI Parry DCI Parry See fewer	Gangs of London (2020)
Ifan Huw Dafydd Wyn Wyn See fewer	Alys (2011)
Lisa Palfrey Nina Nina See fewer	Guest House Paradiso (1999)
Dylan Jones Young Joe Young Joe See fewer	The Red King (2024)
Mari Ann Bull Young Shelley Young Shelley See fewer	Gates (2012)
Llinos Daniel Detective Detective See fewer	Torchwood (2006)
Hannah Dando Alana (as Hannah Mary Dando) Alana (as Hannah Mary Dando) See fewer	Testament (2025)
Hannah Daniel Izzy Izzy See fewer	Hinterland (2013)
Tonya Smith Carwen Carwen See fewer	The Dark (2005)
Morgan Hopkins Dai Dai See fewer	Torchwood (2006)
Shelley Rees Ceri-Ann Ceri-Ann See fewer	Svengali (2013)
Andria Doherty Bronwen Bronwen See fewer	It's a Sin (2021)
Aled Bidder Rhys Rhys See fewer	The Light in the Hall (2022)
Sian Reese-Williams Caryl Caryl See fewer	Cysylltiad (Connection) (2021)
Mabli Jên Eustace Young Izzy Young Izzy See fewer	Enid a Lucy (2019)
Ella Peel Ela Ela See fewer	The Light in the Hall (2022)