The film adaptation of Ali Hazelwood’s viral BookTok sensation, The Love Hypothesis, premiered globally on Prime Video on September 23, 2026. The 112-minute romantic comedy follows the “fake dating” arrangement between a third-year PhD candidate and a notoriously difficult young professor at Stanford.
Directed by Claire Scanlon with a screenplay by Sarah Rothschild, the movie aims to capture the specific STEM-centered charm that made the original novel a bestseller. Beyond the central romance, the production from Amazon MGM Studios and MRC brings a mix of established television stars and rising comedic talent to the screen.
Lili Reinhart as Olive Smith
Lili Reinhart leads the cast as Olive Smith, a biology student whose attempt to convince her best friend that she is over an ex-boyfriend leads to a spontaneous kiss with a stranger—who happens to be a professor. Reinhart takes on a dual role for this project, serving as both the lead actress and an executive producer.
While widely recognized for her long-running role as Betty Cooper on Riverdale, Reinhart’s portrayal of Olive focuses on the character’s social awkwardness and scientific dedication. During promotional tours, Reinhart noted the importance of maintaining the “spicy” elements of the book, specifically the famous hotel room scene, which the film includes to remain faithful to the source material.
Tom Bateman as Dr. Adam Carlsen
Opposite Reinhart is Tom Bateman, who stars as the intimidating and unyielding Dr. Adam Carlsen. Bateman, known for his work in Da Vinci’s Demons and Death on the Nile, plays the “villain” of the biology department who agrees to Olive’s fake-dating scheme for his own academic reasons.
The casting of Bateman brings to life a character that was famously inspired by “Reylo” fan-fiction tropes, requiring a balance of physical presence and eventual emotional vulnerability as the character’s icy exterior thaws.
Supporting Cast and Characters
The film’s supporting ensemble provides the necessary comedic relief and emotional stakes for Olive’s academic journey.
- Rachel Marsh as Anh Pham: Marsh plays Olive’s best friend and fellow scientist. Anh is the primary catalyst for the plot, as her interest in Olive’s ex-boyfriend is what drives Olive to fake a new relationship in the first place.
- Jaboukie Young-White as Malcolm Browne: Comedian and actor Jaboukie Young-White portrays Malcolm, Olive’s supportive and often sarcastic roommate.
- Arty Froushan as Dr. Tom Benton: Froushan plays the role of Adam’s friend and colleague, who plays a pivotal part in the film’s later academic conflicts.
- Nicholas Duvernay as Jeremy Langley: Duvernay appears as Jeremy, the former flame whose presence lingers over the start of Olive’s ruse.
While the film is categorized as a Young Adult comedy on the platform, its faithful adaptation of the novel’s more mature romantic sequences has been a central point of discussion among the established fanbase.
