Dakota Fanning as Tessa Scott

Jeremy Irvine as Adam

Kaya Scodelario as Zoey Walker

Olivia Williams as Mother

Paddy Considine as Father

Edgar Canham as Cal Scott

Joe Cole as Scott

Rose Leslie as Fiona

Franz Drameh as Tommy

Julia Ford as Sally

Julian Wadham as Dr. Ryan

Josef Altin as Jake

Rakie Ayola as Phillippa

Tom Kane as Paul

Susan Brown as Shirley

Sarah Hadland as Caroline

Isabella Laughland as Beth

Patrick Baladi as Richard

Darren Morfitt as Mark

Kate Dickie as Doctor

Sarah Niles as Nurse #2