The Unknown (2026): Cast, Story and Release Details

Prepared by Movies Dock Editorial

Arthur Harari’s The Unknown follows a reclusive photographer whose encounter with a mysterious woman leads to an extraordinary transformation. After pursuing her through a wild night, David Zimmerman wakes in her body, opening a fantasy mystery about identity, disorientation and an altered life.

The Unknown is a French-language fantasy drama with a mystery at its center. Directed by Arthur Harari, the film follows David Zimmerman, a photographer whose isolated routine is disrupted after friends take him to a wild party.

There, David becomes drawn to an enigmatic woman and follows her into the night. By morning, he finds himself facing an impossible change: he has awakened in her body. The film is scheduled for release on August 26, 2026, and has a runtime of 2 hours and 20 minutes.

The Unknown movie details

Story without spoilers

David Zimmerman is a photographer who seldom ventures outside his home. His withdrawn life changes when friends bring him to a party, where he becomes preoccupied with a mysterious woman.

David follows her, but the night leads to a far more unsettling outcome than he could have expected. At dawn, he wakes in her body, turning a chance encounter into a strange mystery involving identity, pursuit and a radically altered existence. The supplied synopsis does not reveal how David responds to the transformation or what he discovers afterward.

What to expect

The Unknown combines fantasy, drama and mystery around a body-switching premise. Its extended 2-hour-20-minute runtime suggests room for the story to explore David’s transformation and its consequences, although the available information does not specify its tone, visual approach or resolution.

The central setup places a solitary photographer in an unfamiliar physical and personal reality after a brief encounter. The film’s mystery comes from the woman David follows and the circumstances surrounding his awakening in her body.

Cast and creative team

Léa Seydoux plays Eva Helsinger / David Zimmerman, while Niels Schneider is credited as David Zimmerman / Malia. The cast also includes Valérie Dréville as Gabi Zimmerman, Lilith Grasmug as Malia, Radu Jude as Malia’s Father, Shanti Masud as Alice, Jonathan Turnbull as Chris Caro and Victoire du Bois as Sophie Caro.

Arthur Harari directs the film and shares writing credit with Vincent Poymiro and Lucas Harari.

• Léa Seydoux as Eva Helsinger / David Zimmerman
• Niels Schneider as David Zimmerman / Malia
• Valérie Dréville as Gabi Zimmerman
• Lilith Grasmug as Malia
• Radu Jude as Malia's Father
• Shanti Masud as Alice
• Jonathan Turnbull as Chris Caro
• Victoire du Bois as Sophie Caro

Release and production context

The Unknown is listed as a 2026 French-language production from France and Italy. Its release date is August 26, 2026, and its runtime is 2 hours and 20 minutes. The production companies are Bathysphere Productions, Pathé, France 2 Cinéma, To Be Continued, Ascent Film, RAI Cinema, Logical Content Ventures and Adler Entertainment.

Production companies: Bathysphere Productions, Pathé, France 2 Cinéma, To Be Continued, Ascent Film, RAI Cinema, Logical Content Ventures, Adler Entertainment

The Unknown official trailer

Watch the official trailer on YouTube

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With its reclusive protagonist, mysterious encounter and sudden change of body, The Unknown is built around a clear speculative hook while remaining classified as a fantasy drama and mystery. The supplied details establish the premise and principal cast, but leave the film’s deeper developments and ending undisclosed.

Film data:
TMDB · IMDb