page_title: Based on a True Story (film)
section_title: Cast
hierarchical_section_title: Based on a True Story (film) / Cast
caption_attribution_description: Français&#160;: festival de Cannes
context_page_description: Based on a True Story is a 2017 internationally co-produced psychological thriller film directed by Roman Polanski, based on the novel of the same name by Delphine de Vigan. It was screened out of competition at the 2017 Cannes Film Festival.
context_section_description: Emmanuelle Seigner as Delphine Dayrieux
  Eva Green as Elle
  Vincent Perez as François
  Dominique Pinon as Raymond
  Camille Chamoux as Oriane
  Brigitte Roüan as The documentalist
  Josée Dayan as Karina
  Noémie Lvovsky as The inspector
  Damien Bonnard as The perchman
caption: Director and stars promoting the film at the 2017 Cannes Film Festival.
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