Elle Fanning

Mary Shelley

Douglas Booth

Percy Bysshe Shelley

Bel Powley

Claire Clairmont

Stephen Dillane

William Godwin

Joanne Froggatt

Mary Jane Clairmont

Tom Sturridge

Lord Byron

Ben Hardy

Dr. John Polidori

Maisie Williams

Isabel Baxter

Hugh O'Conor

Samuel Taylor Coleridge

Ciara Charteris

Harriet Shelley

Jack Hickey

Thomas Hogg

Laurence Foster

Bookseller

Derek Riddell

William Baxter

Stuart Graham

Publisher

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