Shailene Woodley as Jennifer Stirling

Felicity Jones as Ellie Haworth

Callum Turner as Anthony O'Hare

Joe Alwyn as Lawrence Stirling

Nabhaan Rizwan as Rory McCallan

Ncuti Gatwa as Nick

Emma Appleton as Hannah

Christian Brassington as Dominic

Alice Orr-Ewing as Yvonne

Lee Knight as Francis

Zoe Boyle as Anne

Ben Cross as Older Anthony O'Hare

Diana Kent as Older Jennifer Sterling

Wendy Nottingham as Mrs Cordoza

Jacob Fortune-Lloyd as Andrew

Jessica D'Arcy as Co-Worker

Ann Ogbomo as Janet

Rachel Atkins as Alberto's Bar Woman

Jasmine Hyde as French Housekeeper

Atheena Frizzell as Mariette

Emilio Aniba as French Waiter

Matt Mella as French Hotel Receptionist

Ricardo Gilfillan as Felipe

Joann Condon as Post Office Cashier

Jasmine Raymond as Colleague

Jennifer Aries as Post Office Staff Member

Hero Howard as Esme Sterling

Francesca Bailey as London Hotel Receptionist

David Sibley as Don Franklin

Claire Brown as Mary Ellen

Manoj Anand as Train Passenger (uncredited)

Vilhelm Blomgren as Rob (uncredited)

Eve Harding as Train Passenger (uncredited)

Joakim Skarli as Actor (uncredited)

Alfredo Tavares as Charlie (uncredited)

Jennifer Brooke as Chronicle Receptionist