Saoirse Ronan as Rona

Paapa Essiedu as Daynin

Nabil Elouahabi as Samir

Izuka Hoyle as Gloria

Lauren Lyle as Julie

Stephen Dillane as Andrew

Saskia Reeves as Annie

Naomi Wirthner as Amanda

Tony Hamilton-Croft as Gary

Posy Sterling as Rita

Danyal Ismail as Pascal

Scott Miller as Young Andrew

Seamus Dillane as James the Barman

Paul Kulik as Middle aged man

Freya Evans as Young Rona

David Garrick as Bouncer Dave

Aniya Sekkanu as Dr. Rasamalar

Liam Smith as Young Orcadian Man

Eilidh Fisher as Bible Group Evie

Jacqui Hirst as Bible Group Ingrid

Nicola Kilpatrick as Bible Group Gina

Dawn Johnson as Bible Group Kirsty

Jack Rooke as Lukas

David Hills as Lab Supervisor

Alexandre Afjool as Ivan

Gillian Dearness as Elena

Tim Dodman as Simon

Louise McMenemy as Young Annie

Olivia Knight as Newborn Rona

Jack Knight as Newborn Rona

Jamie Crew as Rehab Steven

Isabelle Roux as Rehab Tara

Ammar Younis as Rehab Aahil

Conrad Williamson as Jack

Kevin Shaw as Farmer Edward

Kristen Norquoy as Farmer Catrina

Kyle Mackay as Farmer Robin

Ellis Tait as Farmer Amy

Sweyn Hunter as AA Group James

Paul Rendall as AA Group Stephen

Linn Johansson as Female Stranger

Matthew Coulton as Male Stranger

Martin Gray as Calum

Paul Kulik as Middle Aged Man

Aidan Smith as Young Artist Inis

Robbie Fraser as Ferry Announcer

Dave Gray as Radio Announcer