Rupert Friend as Kevin Lewis

Natascha McElhone as Gloria

Con O'Neill as Dennis

Ioan Gruffudd as Colin Smith

Jodie Whittaker as Jackie

Bernard Hill as Uncle David

Tom Burke as Mr. Hayes

Ralph Brown as Gordon Peters

James Fox as Alan

Shirley Anne Field as Margaret

David O'Hara as Terry

Kate Ashfield as Madeline

William Miller as Young Kevin

Augustus Prew as Teen Kevin

Alfie Allen as Dominic

Sid Mitchell as Paul

Alison Carroll as Clare

Niamh Cusack as 1980 School Nurse

Oliver Milburn as Penfold

Geoffrey Beevers as Headmaster

Ben Hawkey as Billy Saunders

Helen Lederer as Mrs. Saunders

Johnny Palmiero as Lee

Denise Gough as Patsy

Marc Zammit as Ward

Lucinda Rhodes Thakrar as Mandy

Sarah Barrand as Catherine

Steve Collins as Whacker