First Teaser for Unsettling Thriller 'Gentle Monster' with Léa Seydoux"What other secrets do you have?" Netflix has unveiled their teaser trailer for the film Gentle Monster, an unsettling thriller arriving to watch starting in November. Léa Seydoux stars as Lucy Weiss, along with Laurence Rupp, Jella Haase, and Catherine Deneuve. Gentle Monster asks what we do when someone we love turns out to be someone we never really knew. Netflix releases Kreutzer's Gentle Monster in select US theaters starting October 30th, 2026 and for streaming on Netflix on November 18th this fall.