A young Scottish singer, Rose-Lynn Harlan, dreams of making it as a country artist in Nashville after being released from prison.

Jessie Buckley
as Rose-Lynn Harlan

Julie Walters
as Marion

Sophie Okonedo
as Susannah

Jamie Sives
as Sam

Craig Parkinson
as Alan

Adam Mitchell
as Lyle

Daisy Littlefield
as Wynonna

Janey Godley
as Jackie

Louise McCarthy
as Amanda

Maureen Carr
as Eileen