Cate Blanchett as Veronica Guerin

Gerard McSorley as John Gilligan

Ciarán Hinds as John Traynor

Brenda Fricker as Bernie Guerin

Don Wycherley as Chris Mulligan

Barry Barnes as Graham Turley

Simon O'Driscoll as Cathal Turley

Emmet Bergin as Aengus Fanning

Charlotte Bradley as Ann Harris

Mark Lambert as Willy Kealy

Garrett Keogh as Tony Gregory

Maria McDermottroe as Geraldine Gilligan

Paudge Behan as Brian Meehan

Joe Hanley as Eugene 'Dutchie' Holland

David Murray as Charles Bowden

Karl Shiels as Gilligan Gang Member No. 1

Barry McEvoy as Gilligan Gang Member No. 2

Gina Costigan as Traynor's Girlfriend

Alan Devine as Gerry Hutch

Gerry O'Brien as Martin Cahill

Gabrielle Reidy as Frances Cahill

Paul Roe as Tommy Mullen

David Herlihy as Peter 'Fatso' Mitchell

Darragh Kelly as Terry Fagan

Colin Farrell as Tattooed Boy

Laurence Kinlan as Timmy (14 year old Junkie)

Danielle Fox-Clarke as Girl Junkie

Sarah O'Reilly-Maloney as Girl Junkie No. 2

Paul Ronan as Jimmy Guerin

Philip O'Sullivan as Solicitor

Niall Tóibín as Judge Ballaugh

Kevin McHugh as Judge at Assault Trial

Joe Taylor as Priest (Bernadette's Church)

Vinnie McCabe as Priest at Funeral

Des Cave as Police Spokesman

Luke Hayden as Protection Garda No. 1

Joe Gallagher as Protection Garda No. 2

Ned Dennehy as Jamey the Tout

Tommy O'Neill as Cahill Thug No. 1

Shane McCabe as Cahill Thug No. 2

Brian McGuinness as Cahill Thug No. 3

Sally Ann Doddy as Mrs. Hutch

Aaron Harris as Press Conference Reporter No. 1

Jonathan White as Press Conference Reporter No. 2

Maggie Wade as Coleen the Parole Clerk

Anne Cassin as Woman Newscaster

Elizabeth Moynihan as Woman Newscaster No. 2

Jimmy Greeley as Newscaster No. 1

Brian Dobson as Newscaster No. 2

Kevin Reynolds as Studio Interviewer No. 1

Gerry Ryan as Studio Interviewer No. 2

Barbara Brennan as Jealous Journalist No. 1

Gary Lilburn as Jealous Journalist No. 2

Jane Brennan as Jealous Journalist No. 3

Frank Smith as Jealous Journalist No. 4

Malachy McKenna as Male Officer No. 1

Kieran Hurley as Male Officer No. 2

Terry Byrne as Man in Registry Office

Mick Nolan as Tax Assessor

Barbara Ryan as Aengus' Secretary

Enda Oates as Warehouse Worker No. 1

Martin Dunne as Warehouse Worker No. 2

Helen Norton as Witness Nurse No. 1

Noelle Brown as Witness Nurse No. 2

Veronica Duffy as ICU Attendant

Brian Munn as Elegant Equestrian

Cathy White as Elegant Equestrian Woman

Amy Shiels as Gilligan's Mistress

Fiona Glascott as Meehan's Girlfriend

Shelly Smith as Gang Girlfriend No. 1

Gráinne de Buitléar as Gang Girlfriend No. 2

Emily Kelly as Gang Girlfriend No. 3

Vanessa Keogh as Hooker No. 1