Faye Marsay as Alex

Lucy Punch as Olivia

David Tennant as John

Nina Sosanya as Dr. Parks

David Warner as Michael Miller

Gemma Jones as Sue Miller

Simon Bird as Ben Miller

Sarah Parish as Mrs. Jones

Sally Phillips as Amy

Don Warrington as Charles

Georgia Tennant as Alison

Christian Brassington as Danny

Ingrid Oliver as Lily

Tessie Orange-Turner as Alfie

Rebecca Gethings as Biggles Tilsbury

Sunetra Sarker as Carol

Peter Davison as Teacher

Sandra Dickinson as Jury

Kayode Ewumi as Yoga Teacher

Adam Paul Harvey as Nurse Paul

Olive Tennant as Rose