Gina McKee (Marion), Linus Roache (Tom), Rupert Everett (Patrick), Harry Styles (Younger Tom), Emma Corrin (Younger Marion), David Dawson (Younger Patrick), Kadiff Kirwan (Nigel) more..., Emily John (Pamela), Dora Davis (Sylvie), Joseph Potter (Roy), Richard Dempsey (Librarian), Jae Alexander (Pianist London Café), Freya Mavor (Julia), Sean Jackson (Pedestrian), Maddie Rice (Jackie Stewart), Richard Cant (Rudy), Chris Ma (Pianist Argyle Bar), Lucy Briers (Miss Brown), Jack Bandeira (Leonard), Gareth Kennerley (Policeman in Alleyway), John Sandeman (Policeman in Alleyway), Nicholas Tennant (Gordon Burgess), Charlotte Randle (Mrs. Burgess), Patrick Brennan (Detective Inspector), Brian Martin (Police Constable), James Tucker (Duty Police Officer), Tristan Sturrock (Defense Counsel), Ian Drysdale (Prosecutor), Stefano Braschi (Jonathan), Harry Attwell (Prison Guard), Simon Shorten (Prison Cellmate), Michael Ayala-Cole (Teddy Boy (uncredited)), James Hare (Pier Visitor (uncredited)), Sarah Lockett (Teacher (uncredited)), Róisín Monaghan (Teacher (uncredited)), Andrew Tiernan (Bert (uncredited))

Maria Djurkovic (Production Design), Steven Price (Original Music Composer), Ben Davis (Director of Photography), Ron Nyswaner (Screenplay), Caroline Levy (Executive Producer), Greg Berlanti (Producer), Julie Harkin (Casting) more..., Sarah Schechter (Producer), Robbie Rogers (Producer), Cora Palfrey (Producer), Philip Herd (Producer), Bethan Roberts (Novel), Sam Stevenson (Casting), Annie Symons (Costume Design), Christopher Atkinson (First Assistant Sound Editor), Roddy McDonald (Assistant Editor), Matthew Swan (Dressing Prop), Gareth Cousins (Scoring Mixer), Ian Wilson (Supervising Sound Editor), Michael Riley (Executive Producer), Rae Hendrie (Casting Associate), Daisy White (Location Assistant), Yvonne Duckett (Costume Supervisor), Dean Moran (Carpenter), Susanna Lenton (Script Supervisor), Elizabeth Himelstein (Dialect Coach), Johnathan Rush (Other), Simon Trundle (Foley), Dan Morgan (Supervising Sound Editor), Jason Lawrence (Makeup & Hair), Paul Hanks (Foley Artist), John Marzano (Aerial Director of Photography), Carole Salisbury (Additional Script Supervisor), Lottie McDowell (Art Direction), Charlie Somers (Location Manager), Mark Michaels (Visual Effects Supervisor), Rebecca Higginson (Principal Costumer), Ben Gladstone (Location Scout), Lorna Gay Copp (Dressing Prop), Alan Gilchrist (Dressing Prop) and others.