Elle Fanning

Mary Shelley

Douglas Booth

Percy Bysshe Shelley

Maisie Williams

Isabel Baxter

Stuart Graham

Publisher

Hugh O'Conor

Samuel Taylor Coleridge

Stephen Dillane

William Godwin

Tom Sturridge

Lord Byron

Bel Powley

Claire Clairmont

Joanne Froggatt

Mary Jane Clairmont

Ben Hardy

Dr. John Polidori

Derek Riddell

William Baxter

Jack Hickey

Thomas Hogg

Ciara Charteris

Harriet Shelley

Laurence Foster

Bookseller

Owen Richards

William Godwin

Martin Phillips

Deacon

Chloe Vos

Ianthe

Serena Barnes

Landlady

Mella Carron

Girl in Park

Sarah Lamesch

Eliza

Alexander Cobb

Scientist

Wilhelmina von Blumenthal

Servant of Byron

Nathan Vos

Young Percy

Haifaa al-Mansour

Director

Emma Jensen

Writer