Gaspard Ulliel

as Percy Bysshe Shelley (voice)

Marianne Faithfull

as Narrator (voice)

Lola Peploe

as Mary Shelley (voice)

Christophe Dilys

as Percy Bysshe Shelley (English voice)

Warren Ellis

as Docteur Polidori / Echos (voice)

Jean-François Néollier

as Narrator / Sir Edward Trelawny (voice)

Tanguy Blum

as (voice)

Jérôme Ters

as (voice)