Judi Dench (Philomena), Steve Coogan (Martin Sixsmith), Sophie Kennedy Clark (Young Philomena), Mare Winningham (Mary), Barbara Jefford (Sister Hildegarde), Ruth McCabe (Mother Barbara), Peter Hermann (Pete Olsson) more..., Sean Mahon (Michael), Anna Maxwell Martin (Jane), Michelle Fairley (Sally Mitchell), Wunmi Mosaku (Young Nun), Amy McAllister (Sister Anunciata), Charlie Murphy (Kathleen), Cathy Belton (Sister Claire), Kate Fleetwood (Young Sister Hildegarde), Charissa Shearer (Peg), Nika McGuigan (Bridie), Rachel Wilcock (Mamie), Rita Hamill (Nursery Nun), Tadhg Bowen (Young Anthony), Saoirse Bowen (Young Mary), Harrison D'Ampney (Anthony (8-10 Years)), D.J. McGrath (John), Simone Lahbib (Kate Sixsmith), Sara Stewart (Marcia Weller), Gary Lilburn (Priest), Charles Edwards (David), Nicholas Jones (Dr. Robert), Paris Arrowsmith (Bellboy), Marie Jones (Barman's Mum), Frankie McCafferty (Barman), Vaughn Johseph (Receptionist Hotel), George Fisher (Omelette Chef), Jordan King (Waitress), Amber Batty (Marge), Martin Glyn Murray (Father), Florence Keith-Roach (Check In Operator), George Michael Rados (Priest In Church), Elliot Levey (Alex), Timothy Paul Jobe (Doc Hess)

Alexandre Desplat (Original Music Composer), Steve Coogan (Screenplay), Steve Coogan (Producer), Henry Normal (Executive Producer), François Ivernel (Executive Producer), Christine Langan (Executive Producer), Tracey Seaward (Producer) more..., Cameron McCracken (Executive Producer), Alan MacDonald (Production Design), Consolata Boyle (Costume Design), Valerio Bonelli (Editor), Rod McLean (Supervising Art Director), Barbara Herman-Skelding (Set Decoration), Robbie Ryan (Director of Photography), Gabrielle Tana (Producer), Carolyn Marks Blackwood (Executive Producer), Jeff Pope (Screenplay), Sarah Stuart (Art Direction), Martin Sixsmith (Novel), Bradley Porter (Other),