Barry Keoghan Oliver Quick Jacob Elordi Felix Catton Rosamund Pike Elspeth Catton Richard E. Grant Sir James Catton Alison Oliver Venetia Catton Archie Madekwe Farleigh Start Carey Mulligan Poor Dear Pamela Paul Rhys Duncan Ewan Mitchell Michael Gavey Sadie Soverall Annabel Tasha Lim Camilla Reece Shearsmith Professor Ware Gabriel Bisset-Smith Reg Starter Glyn Grimstead Taxi Driver Lolly Adefope Lady Daphne Joshua McGuire Henry Dorothy Atkinson Paula Quick Shaun Dooley Jeff Quick