- Michael Ford-FitzGerald
- Â Harry Butler / ... 7 episodes, 2016-2019
- Jordanne Jones
- Â Minnie Mahon 7 episodes, 2016-2019
- Brian Gleeson
- Â Jimmy Mahon / ... 7 episodes, 2016-2019
- Jaelynne Wallace Ruane
- Â Sadie Mahon 6 episodes, 2016-2019
- Ruth Bradley
- Â Frances O'Flaherty 5 episodes, 2016
- Paul Reid
- Â Stephen Duffy Lyons 5 episodes, 2016
- Brian McCardie
- Â James Connolly 5 episodes, 2016
- Tom Turner
- Â Charles Hammond 5 episodes, 2016
- Michelle Fairley
- Â Dolly Butler 5 episodes, 2016
- Lydia McGuinness
- Â Peggy Mahon 5 episodes, 2016
- Ian McElhinney
- Â Edward Butler 5 episodes, 2016
- Andrew Simpson
- Â George Wilson 5 episodes, 2016
- Gus McDonagh
- Â Monsignor Mulcahy 5 episodes, 2016
- Millie Donnelly
- Â Gracie Mahon 5 episodes, 2016
- Steve Wall
- Â Detective Coleman 5 episodes, 2016
- Charlie Murphy
- Â Elizabeth Butler 5 episodes, 2016
- Fergal McElherron
- Â Maurice Jacobs 5 episodes, 2019
- Simone Kirby
- Â Ursula Sweeney 5 episodes, 2019
- Sarah Greene
- Â May Lacey 5 episodes, 2016
- Marcus Lamb
- Â Patrick Pearse 4 episodes, 2016
- Barry Keoghan
- Â Cormac McDevitt 4 episodes, 2016
- Barry Ward
- Â Arthur Mahon 4 episodes, 2016
- Laurence O'Fuarain
- Â Desmond Byrne 4 episodes, 2016
- Sophie Robinson
- Â Ingrid Webster 4 episodes, 2016
- Jason Cullen
- Â Peter Mahon 4 episodes, 2016
- Joanne Brennan
- Â Dr. Kathleen Lynn 4 episodes, 2016
- Niamh Cusack
- Â Nelly Cosgrave 4 episodes, 2016
- Michael Feast
- Â Sir Matthew Nathan 4 episodes, 2016
- Ryan McAllister
- Â Sylvester the Butler 4 episodes, 2016
- Perdita Weeks
- Â Vanessa Hammond 4 episodes, 2016
- Sebastian Thommen
- Â Michael Collins 3 episodes, 2016
- Lalor Roddy
- Â Thomas Clarke 3 episodes, 2016
- Sean Fox
- Â Sean McDermott 3 episodes, 2016
- Stefan Dunbar
- Â Corporal Stewart 3 episodes, 2016
- Ruairà Heading
- Â Fusilier McGarry 3 episodes, 2016
- Jane Herbert
- Â Gretta the Maid 3 episodes, 2016
- Kieran O'Reilly
- Â Captain Robert Barton 3 episodes, 2016
- Camille O'Sullivan
- Â Countess Constance Markievicz 3 episodes, 2016
- Jack Shepherd
- Â General William Lowe 3 episodes, 2016
- James Craze
- Â 'Blimey' O'Connor 2 episodes, 2016
- Conall Keating
- Â Joey Bradley 2 episodes, 2019
- Brian Doherty
- Â Frank Brogan 2 episodes, 2019
- Catherine Walker
- Â Constance Butler 2 episodes, 2019
- Tom Bennett
- Â Mark Sturgis 2 episodes, 2019
- Aoife Duffin
- Â Eithne Drury 2 episodes, 2019
- Tommy Harris
-  Seánie Duggan 2 episodes, 2019
- Barry Barnes
- Â Constable James O'Brien 2 episodes, 2016
- David Wilmot
- Â Patrick Mahon 2 episodes, 2019
- Matthew Hopkinson
- Â Albert Finlay 2 episodes, 2019
- Natasha O'Keeffe
- Â Agnes Moore 2 episodes, 2019
- Paul Ritter
- Â General Ormonde Winter 2 episodes, 2019
- Richard Doubleday
- Â Major Mills 2 episodes, 2019
- Dominic Thorburn
- Â Wilf Richardson 2 episodes, 2019
- John Connors
- Â Michael Molloy 2 episodes, 2016
- Stanley Townsend
- Â Senator Daniel Shea 2 episodes, 2019
- Craig Parkinson
- Â Captain David McLeod 2 episodes, 2019
- Barry McGovern
- Â Archbishop William Walsh 2 episodes, 2016
- Ben Smith
- Â Robbie Lennox 2 episodes, 2019
- Hugh O'Conor
- Â Dr. Lawrence Moore 2 episodes, 2019
- Conor MacNeill
- Â Diarmuid McWilliams 2 episodes, 2019
- Imogen Doel
- Â Lily Lawlor 2 episodes, 2019
- Chris McHallem
- Â Albert Saunders 2 episodes, 2019
- Paul McCloskey
- Â Sergeant McAuley 2 episodes, 2016
- Keith Patrick Byrne
- Â Barman 2 episodes, 2016
- Adrian Hudson
- Â Lofty Lloyd 2 episodes, 2016
- Charlie Bonner
- Â William Wylie 2 episodes, 2016
- Mark Lambert
- Â Brigadier Blackader 2 episodes, 2016
- Ann Skelly
- Â Biddy Lambert 2 episodes, 2016
- Edwin Mullane
- Â Brophy the debt collector 2 episodes, 2016
- Charlie Kelly
- Â Fusilier O'Hanlon 2 episodes, 2016
- Patrick Buchanan
- Â Captain Bowen-Colthurst 1 episode, 2016
- Eemeli Louhimies
- Â Milo 1 episode, 2016
- Gavin Drea
- Â Michael Collins 1 episode, 2019
- Andrew Bennett
- Â Arthur Griffith 1 episode, 2019
- John Cronin
-  Seán T. O'Kelly 1 episode, 2019
- Andrei Alén
- Â Captain Heathcote 1 episode, 2016
- Stephen Mullan
- Â Eamon de Valera 1 episode, 2016
- Elva Trill
- Â Ms. Esme Quinn 1 episode, 2016
- Lynn Rafferty
- Â Prostitute 1 episode, 2016
- Paul Kealyn
- Â ICA Man 1 episode, 2016
- Dylan Kelly
- Â ICA Man 2 1 episode, 2016
- Helen Norton
- Â Bridget Boyle 1 episode, 2019
- Lilymai Clancy
- Â Gracie Mahon 1 episode, 2019
- Enda Oates
- Â Benjamin Barrett 1 episode, 2019
- Ian Toner
- Â Lieutenant Mick Malone 1 episode, 2016
- Fintan Phelan
- Â Driver 1 episode, 2016
- Jack Hickey
-  Seán Connolly 1 episode, 2016
- Aidan Lawlor
- Â Dennis Thornton 1 episode, 2019
- Jed Murray
- Â British Lieutenant 1 episode, 2016
- Hilary Vesey
- Â Woman at Tenements 1 episode, 2016
- Paul Booth
- Â Captain Lee-Wilson 1 episode, 2016
- Barbara Bergin
- Â Mrs. Lyons 1 episode, 2019
- Norma Sheahan
- Â Sister Patrick 1 episode, 2016
- Dawn Bradfield
- Â Nora Mahon 1 episode, 2019
- Terry O'Neill
- Â Looting Man 1 episode, 2016
- Joanne Crawford
- Â Sr. Benedict 1 episode, 2019
- Paul Meade
- Â Justice Prendergast 1 episode, 2019
- Brendan McCormack
- Â DMP Sergeant 1 episode, 2016
- Emer O'Grady
- Â Housewife 1 episode, 2016
- Aoibhinn McGinnity
- Â Josephine Carmichael 1 episode, 2019
- Dan Siron
- Â Liverpool Soldier 1 episode, 2016
- Stephen O'Brien
- Â Volunteer 1 episode, 2016
- Aidan O'Hare
- Â RIC Officer 1 episode, 2019
- Graham Dodd
- Â Van Driver 1 episode, 2016
- Shane Fallon
- Â Guard at Security 1 episode, 2019
- Manus Halligan
- Â Northamptonshire Soldier 1 episode, 2016
- Faolan Morgan
- Â Tall Fusilier 1 episode, 2016
- Rory Corcoran
- Â Dying Man 1 episode, 2016
- Una Carroll
- Â Frances's friend 1 episode, 2016
- Alice Stands
- Â Secretary 1 episode, 2016
- James Jake Martinez
- Â Soldier (uncredited) 1 episode, 2016