Name	Known for
Joe Breen Young Michael O'Farrell Young Michael O'Farrell See fewer	Angela's Ashes (1999)
Frank Laverty Tony O'Keefe Tony O'Keefe See fewer	Michael Collins (1996)
Daragh O'Malley Barry King Barry King See fewer	Sharpe's Peril (2008)
Laurence Kinlan John King John King See fewer	Marcella (2016)
Tom Sullivan Ger Ronan (as Tomás Ó Súilleabháin) Ger Ronan (as Tomás Ó Súilleabháin) See fewer	Monster (2019)
Séana Montague Paula O'Farrell (as Séana Montague) Paula O'Farrell (as Séana Montague) See fewer	Elizabeth (2000)
Peter Gowen Mike O'Farrell Mike O'Farrell See fewer	Breakfast on Pluto (2005)
Pat Laffan Padraig O'Farrell Padraig O'Farrell See fewer	The Saint (1997)
Charlotte Bradley Helen King Helen King See fewer	The Gift (2014)
Britta Smith Martha O'Keefe Martha O'Keefe See fewer	The Magdalene Sisters (2002)
Ronan Wilmot Willie Sexton Willie Sexton See fewer	In the Name of the Father (1993)
Stella McCusker Kate O'Farrell Kate O'Farrell See fewer	Five Minutes of Heaven (2009)
Robert Price Stephen Elliot Stephen Elliot See fewer	Borstal Boy (2000)
Robert Hickey Kieran Dunne Kieran Dunne See fewer	Waking Ned Devine (1998)
Jonathan Byrne Brendan Ruane Brendan Ruane See fewer	The Machine (I) (2013)
Tony Rohr Brian Horan Brian Horan See fewer	Leap Year (2010)
Sean McGinley Fergal Collins Fergal Collins See fewer	On a Clear Day (2005)
Viko Nikci Damik Damik See fewer	Coming Home (V) (2014)
Dermot Whelan Radio DJ Radio DJ See fewer	St. Ives (1998)
Renee Weldon Sharon O'Connor (as Renée Weldon) Sharon O'Connor (as Renée Weldon) See fewer	Trouble with Sex (2005)
Tadhg McMahon Nick Nick See fewer	Shooting Oliver (2013)
Brigid Duffy Geraldine O'Connor Geraldine O'Connor See fewer	On Home Ground (2001)
Darren McHugh Liam Coffey Liam Coffey See fewer	In the Name of the Father (1993)
Aiden Condron Victor (as Aidan Condron) Victor (as Aidan Condron) See fewer	Saving Private Ryan (1998)
Stephen Kennedy Eoin Lynch Eoin Lynch See fewer	Notes on a Scandal (2006)
Orla Charlton Ann Marie Collins Ann Marie Collins See fewer	6Degrees (2012)
Dominique McElligott Cora Collins Cora Collins See fewer	Leap Year (2010)
Barbara Griffin Physiotherapist Physiotherapist See fewer	The New Adventures of Robin Hood (1997)
Amy Huberman Diane Collins Diane Collins See fewer	The Bachelor Weekend (2013)
Rory Keenan Kevin King Kevin King See fewer	The Guard (2011)
Gary Lydon Cathal O'Connor Cathal O'Connor See fewer	The Banshees of Inisherin (2022)
Barry O'Connor Big Paul (as Barry John O'Connor) Big Paul (as Barry John O'Connor) See fewer	Dungeons & Dragons: Honor Among Thieves (2023)