Mary Shelley. Genre: Romance, Drama. Director: Haifaa al-Mansour. Cast: Elle Fanning, Douglas Booth, Bel Powley, Stephen Dillane, Joanne Froggatt. Release Date: 2017-08-06. Runtime: 120 minutes. Rating: 7/10. The love affair between poet Percy Shelley and Mary Wollstonecraft Godwin resulted in the creation of an immortal novel, “Frankenstein; or, The Modern Prometheus.”