Emily

Evanna Lynch

Robert

Michael Smiley

Arden

George Webster

Swimming Teacher

Martin McCann

Greasy Haired Teacher

Cathy Belton

Emily's mother

Deirdre Mullins

Arden's father

Declan Conlon

Dr. Golding

Barry McGovern

Young Policeman

Dónall Ó Héalai

Granny

Stella McCusker

Young Emily

Sarah Minto

June

Ally Ni Chiarain

Arden's Mother

Ali White

Midwife

Laura Matassa

Square Head

John Travers

Bearded Teacher

Michael Hough

Young Policeman

Donall O'Healai

Nurse

Catherine Walsh

Newborn Emily

Millie Donnelly

Robert's school Groupie

Ann Marie Murray

Steve

Loui Vangelder

Toddler Emily

Sadie Fitzmaurice

Toddler Emily

Hunter Fitzmaurice

Male Student

Conor Knox

Young Arden

Kai Power

Trapeze Artist

Kate Parry

Bored Student (uncredited)

Bobby Calloway

Girl Swimming (uncredited)

Meghan Jones

Fan in Bookshop (uncredited)

Peter Robbie