Emilia Clarke (Kate Andrich), Henry Golding (Tom Webster), Michelle Yeoh (Santa), Emma Thompson (Petra Andrich), Lydia Leonard (Marta Andrich), Boris Isaković (Ivan Andrich), Rebecca Root (Dr. Addis) more..., Ingrid Oliver (Police Woman Crowley), Laura Evelyn (Police Woman Churchill), Patti LuPone (Joyce), Calvin Demba (Nathan), Ritu Arya (Jenna), Ansu Kabia (Rufus), Jade Anouka (Alba), Rob Delaney (Theatre Director), Peter Serafinowicz (Theatre Producer), Sara Powell (Casting Director), Peter Mygind (The Dane (aka ‘Boy’)), Amit Shah (Andy), Maxim Baldry (Ed), Margaret Clunie (Sarah), Sue Perkins (Ice Show Director), John-Luke Roberts (Klaus the German Clown), Madison Ingoldsby (Young Kate), Lucy Miller (Young Marta), Bilal Zafar (Oscar), Ben Owen-Jones (Danny), David Hargreaves (Arthur), Joe Blakemore (Tom), Anna Calder-Marshall (Dora), Leon Delroy Williams (Traffic Cone Man), Jassie Mortimer (Croatian Woman), Michael Matovski (Croatian Man), Jake Lampert (Angry Man on Bus), Liran Nathan (Moroccan Vendor), Laila Alj (Moroccan Vendor's Wife), David Mumeni (Guy in Pub), Andrew Ridgeley (Man in Audience at Homeless Shelter Benefit (uncredited)), Jacqueline Ramnarine (Homeless Person (uncredited)), Nichola Jean Mazur (Nurse Jane (uncredited)) and others.

Emma Thompson (Screenplay), Bryony Kimmings (Screenplay), David Livingstone (Producer), Emma Thompson (Producer), Erik Baiers (Producer), George Michael (Producer), Sarah Bradshaw (Executive Producer) more..., Theodore Shapiro (Original Music Composer), John Schwartzman (Director of Photography), Alice Searby (Casting Director), Fiona Weir (Casting Director), Gary Freeman (Production Design), Richard Hardy (Art Direction), Raffaella Giovannetti (Set Decoration), Renee Ehrlich Kalfus (Costume Design), Brent White (Editor), Daniel Phillips (Makeup & Hair), Michael Solinger (Production Supervisor), Peter Hooper (Greensman), Tom Still (Supervising Art Director), Pippa Woods (Makeup & Hair), Simone Goodridge (Unit Production Manager), Cécile Bouquet (Art Department Coordinator), Andrea Cracknell (Makeup & Hair), Joel Block (Standby Property Master), Rebecca Adams (Production Supervisor), Jo Barrass-Short (Makeup & Hair), Roberto Oliveri (Art Department Assistant), Isona Rigau (Standby Art Director), Sandro Piccarozzi (Assistant Set Decoration), Grant Butler (Third Assistant Director), Ida Grundsoee (Draughtsman), Yasmin Al-Naib (Assistant Set Decoration), Dave Fisher (Charge Scenic Artist), Sean T. Stratton (Production Executive), Annie Hitchcock (Crowd Assistant Director), Shane Harford (Art Department Assistant), John W. Wheatley (Props), Phil Booth (First Assistant Director), Colin Matthews (Props) and others.