Brendan Gleeson as Martin Cahill

Adrian Dunbar as Noel Curley

Sean McGinley as Gary

Maria Doyle Kennedy as Frances

Angeline Ball as Tina

Jon Voight as Inspector Ned Kenny

Eanna MacLiam as Jimmy

Tom Murphy as Willie Byrne

John Cronin as Aiden

Paul Hickey as Anthony

Ciarán Fitzgerald as Tommy

Ned Dennehy as Gay

Pat Laffan as Sgt. Patrick Higgins

Eamonn Owens as Young Martin Cahill

Ronan Wilmot as James Donovan

David Wilmot as Assassin

Stephen Brennan as Arthur Ryan

Brendan Coyle as UVF Leader

Jim Sheridan as CPAD Leader

Vinny Murphy as Harry

Pat Laffan as Police Sergeant Patrick Higgins

Colleen O'Neill as Patricia

Maebh Gorby as Sylvie

Frank Melia as Lawless

Lynn Cahill as Arcade Woman

Don Wycherley as Henry Mackie, Cahill's Defence

Pat Kinevane as Desk Guard

Barry McGovern as IRA Man 1

Patrick Condren as IRA Man 2

Darren Miley as Young Anthony

Mark Quigley as Young Paddy

Frank Laverty as Garda 1

Kieran Hurley as Garda 2

Cathy White as Tour Guide

Anne Kent as Mrs Cahill

Donncha Crowley as 1962 Priest

Aoife Moriarty as Young Frances

Clive Geraghty as Commissioner

Neilí Conroy as Maeve

Peter-Hugo Daly as Beavis, Fence

Des Cave as HC Chairman

Brendan Conroy as Corporation Official

Brian McGrath as Doctor

Alan Barry as Judge 2

Pat Leavy as Mrs Duggan

Niamh Lineham as Reporter

Jason Byrne as Reporter 2

Owen O'Neill as Revenue Man 1

David Carey as Revenue Man 2

Ann Doyle as TV Newsreader

Emma McIvor as Woman Worker

Daragh Kelly as Young Detective

Andrew Bennett as Hollyfield Priest

Anthony Fox as Garda 3

Gavin Kelty as Young Hood 1

Darren Healy as Young Hood 2

Jeff O'Toole as Young Hood 3

Mark Dunne as Young Hood 4

Gerard Kearney as Young Hood 5

Tony Flynn as Security Guard

Jim Reid as Mr Crenshaw

Liz Schwartz as Nanny

Ami Hedges as Baby

Karl Deegan as Garda 4

Mick O'Brien as Garda 5

Des O'Malley as Himself

Kevin Flood as Judge

Roxanna Nic Liam as Orla