Helena Bonham Carter as Enid Blyton

Matthew Macfadyen as Hugh Pollock

Denis Lawson as Kenneth Waters

Claire Rushbrook as Dorothy Richards

Joseph Millson as Hanly Blyton

Ramona Marquez as Imogen

Lisa Diveney as Enid (aged 19)

Pooky Quesnel as Theresa Blyton

Eileen O'Higgins as Maid Maggie

Douglas Reith as BBC Interviewer

Nicholas Lumley as Dr. Beresford

Sinead Michael as Gillian

Philip Wright as Thomas Blyton

Alexandra Brain as Enid (aged 12)

Samuel Hilton as Hanly Blyton (aged 8)

James Warner as Carey Blyton (aged 4)

Gabrielle Reidy as Mrs Waters

Nicholas Lumley as Dr Beresford

Claire Carrie as Betty

Travis Oliver as Army Officer

Toby Manley as Librarian

Harry Taylor as Chauffeur

Sion Davies as Child at Party

Isabella Blake-Thomas as Child at Party