- Brendan Gleeson
- Liam O'Leary / The Double
- Kim Cattrall
- Jane O'Leary
- Ciarán Hinds
- Father Andy
- Sinéad Cusack
- Oona O'Leary
- Sean McGinley
- Declan Murray
- Cathy Belton
- Sally
- Brian Gleeson
- Connor O'Leary
- Angeline Ball
- Ursula
- Paul Gannon
- Obstructing Man
- Ruth McCabe
- Large Woman
- Stanley Townsend
- Jim Brady - The Banker
- Moira Deady
- Maeve - Liam's Mother
- Michael McElhatton
- Dr. Alex Loden
- Michael Ford-FitzGerald
- Male Nurse
- Denis Conway
- Bertie Brennan
- Charlene McKenna
- Samantha
- Tom Vaughan-Lawlor
- Larry Cooney
- Ruth Lawlor
- Larry's Secretary
- Eanna MacLiam
- The Beggar
- John Kavanagh
- Harry (Oona's Husband)
- Conor Mullen
- MC
- Regan O'Brien
- Nurse
- Derry Power
- Eddie
- Ned Dennehy
- Felim
- Gary Murphy
- Garda
- Martin Murphy
- Garda #1
- David Herlihy
- Paul - Ursula's Husband
- Aonghus Og McAnally
- Garda #2
- Mark Lambert
- District Judge
- Philip O'Sullivan
- Assistant Governor
- Paolo Tullio
- Patrick Le Say
- Nigel Linden
- Samantha's Boyfriend
- Geoff Minogue
- Ambulance Driver
- Frank Gleeson
- The Double's Double
- Anne Comyn
- Patient
- Nathan Doherty
- (uncredited)
- Conor Flannery
- Extra in Bar & Disco
- Sean Markey
- Drinker
- Stephen Daniel Morrison
- Reveller
- Daniel Rooney
- Nightclub Patron
- Brian Sheridan
- Security Guard
- Mary Alexandra Woods
- Prostitute
