Evanna Lynch

Emily

Michael Smiley

Robert

George Webster

Arden

Deirdre Mullins

Emily's Mother

Cathy Belton

Greasy Haired Teacher

Martin McCann

Swimming Teacher

Barry McGovern

Dr. Golding

Stella McCusker

Granny

Declan Conlon

Arden's father

Dónall Ó Héalai

Young Policeman

Ally Ní Chiárain

June

Laura Matassa

Midwife

John Travers

Square Head

Sarah Minto

Young Emily

Michael Hough

Peter Spade

Ali White

Arden's Mother

Millie Donnelly

Newborn Emily

Ann Marie Murray

Robert's school Groupie

Catherine Walsh

Nurse

Loui Vangelder

Steve

Sadie Fitzmaurice

Toddler Emily

Hunter Fitzmaurice

Toddler Emily

Conor Knox

Male Student

Kai Power

Young Arden

Kate Parry

Trapeze Artist

Bobby Calloway

Bored Student (uncredited)

Meghan Jones

Girl Swimming (uncredited)

Peter Robbie

Fan in Bookshop (uncredited)