Lili Reinhart to star in ‘The Love Hypothesis’ film adaptation

Lili Reinhart is set to lead the highly anticipated film adaptation of Ali Hazelwood’s bestselling romance novel The Love Hypothesis, taking on the role of Olive Smith.

Reinhart’s involvement has been publicly confirmed through her social media presence, where she has shared content surrounding the upcoming project. Her Instagram has also featured promotional material for the film, including her appearance as Olive Smith, providing fans with a direct look at her involvement in the adaptation.

The film pairs Reinhart with British actor Tom Bateman, who plays Dr. Adam Carlsen. The two lead a cast that also includes Rachel Marsh, Nicholas Duvernay, Jaboukie Young-White and Arty Froushan. The project is directed by Claire Scanlon, with a screenplay by Sarah Rothschild.

Based on Hazelwood’s 2021 bestseller, The Love Hypothesis marks the author’s move from one of contemporary romance’s most popular novels to the big screen. The adaptation has attracted considerable attention from readers who have followed the book since its publication and have long anticipated seeing its characters portrayed on screen.

Reinhart is not only starring in the film but is also involved as an executive producer, giving her a role behind the camera as well as in front of it. Hazelwood is likewise an executive producer on the project.

The first official trailer has now given audiences their first substantial glimpse of Reinhart and Bateman in character, further increasing anticipation ahead of the film’s release. The trailer showcases the chemistry between the two leads while offering fans several moments familiar to readers of Hazelwood’s novel.

Prime Video has confirmed that The Love Hypothesis will premiere globally on September 23, 2026. The release will bring one of the most recognizable contemporary romance titles to a worldwide streaming audience.

With Reinhart at the center of the adaptation and Hazelwood closely involved in the production, expectations are high for the film. For fans of the bestselling novel, the September premiere will finally provide an opportunity to see Olive Smith brought to life by Reinhart on screen.

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