Name	Known for
David Wilmot Dr. Ed Costello Dr. Ed Costello See fewer	Anna Karenina (I) (2012)
Dominic Mafham Dan Woodhouse Dan Woodhouse See fewer	Ophelia (I) (2018)
Aisling O'Sullivan Dr. Cathy Costello Dr. Cathy Costello See fewer	Raw (2008)
Norma Sheahan Fiona McColgan Fiona McColgan See fewer	Dead Still (2020)
Gary Lydon Patrick Murray Patrick Murray See fewer	The Banshees of Inisherin (2022)
Lorraine Pilkington Susie Cassidy Susie Cassidy See fewer	Human Traffic (1999)
Amy Huberman Daisy O'Callaghan Daisy O'Callaghan See fewer	The Bachelor Weekend (2013)
Gertrude Montgomery Aine Flanagan Aine Flanagan See fewer	Ondine (2009)
Rachel Pilkington Keelin Geraghty (as Rachael Pilkington) Keelin Geraghty (as Rachael Pilkington) See fewer	The Clinic (I) (2003)
Geraldine Plunkett Mrs. Fleming Mrs. Fleming See fewer	Glenroe (1983)
Chris O'Dowd Brendan Davenport Brendan Davenport See fewer	Bridesmaids (I) (2011)
Sam Corry Alex / Chris Walsh Alex / Chris Walsh See fewer	Primeval (2007)
Mejhola Adebayo Grace Grace See fewer	The Clinic (I) (2003)
Eva Bartley Polly Polly See fewer	Vikings (2013)
Ruth Bradley Moya Cassidy Moya Cassidy See fewer	Grabbers (2012)
Paraic Breathnach Mr. Colgan (as Páraic Breathnach) Mr. Colgan (as Páraic Breathnach) See fewer	Michael Collins (1996)
Michelle Fairley Shirley Shirley See fewer	Game of Thrones (2011)
Sean Flanagan Sean Connell Sean Connell See fewer	Squatters (2020)
Rory Keenan Michael Michael See fewer	The Guard (2011)
Ruth McCabe Maria Geraghty Maria Geraghty See fewer	My Left Foot (1989)
Ger Ryan Ann Connell Ann Connell See fewer	The Man Who Invented Christmas (2017)
Olivia Shanley Mrs. Considine Mrs. Considine See fewer	EastEnders (1985)
Jude Sweeney Anthony Anthony See fewer	The Count of Monte Cristo (2002)