Ruth Wilson as Alice Bell

Mark Stanley as Joe Bell

Sean Bean as Richard Bell

Esmé Creed-Miles as Young Alice

Dean Andrews as Matty

Joe Dempsie as David

Mike Noble as Rowan Spender

Aiden McCullough as Young Joe

Shane Attwooll as Tower

Steve Garti as Jim

Una McNulty as Susan Bell

Jonah Russell as Pete

Paul Roberson as Declan

Olivia Brennan as Ellie

Ophelia Campbell as Alice Bell as a child in a photo

Alfie Charlesworth as Joe Bell as a child in a photo