Toby Jones as Philip Burton

Lesley Manville as Ma Smith

Harry Lawtey as Richard Jenkins Jr.

Aimee-Ffion Edwards as Cecilia 'Cis' Jenkins

Aneurin Barnard as Eifed James

Steffan Rhodri as Dic Jenkins

Mali O'Donnell as Phyllis Dolan

Alfie Llewellyn as Evans

Dylan Jones as Morgan

Rhys ap William as Mr David

Agnes Evans as Rhianon

Amelia Porter as Marian

Lynn Hunter as Betty

Oliver Ryan as Co-op Manager

Osian Morgan as Baynham

Richard Elfyn as Governor

Mark Meadows as Headmster

Caroline Sheen as Mrs Meredith

Eluned Hawkins as Edith

Matthew Gravelle as Sir Cyril Cooke

Tonya Smith as Bank Cashier

Hannah New as Daphne Rye

Hanna Jarman as Audition Mother

Daniel Evans as Anthony Quayle

Hubert Burton as Robert 'Tim' Hardy

Hamish Gray as Harry Andrews

Carys Bowkett as Jenny

Mabli Jen Eustace as Jane