Prime Video releases the first official trailer for the bestselling adaptation The Love Hypothesis.

The Love Hypothesis trailer features Reneé Rapp's song 'Messy' as its soundtrack, marking a noticeable musical choice for the promo
Sarah Rothschild is credited with writing the screenplay, with Elizabeth Cantillon producing the film
Ali Hazelwood originally wrote The Love Hypothesis as Head Over Feet in 2018 as Star Wars fan fiction under the pen name 'Ever-So-Reylo' before publishing the 2021 novel
The trailer includes a notable Easter egg nod to the book cover during the kiss scene, a detail highlighted by early promotional materials
Prime Video's The Love Hypothesis dropped its first trailer on September 23, introducing viewers to Lili Reinhart and Tom Bateman's fake-dating romance. FirstShowing reports the film adapts Ali Hazelwood's bestselling 2021 novel, directed by Claire Scanlon. The trailer teases key moments—from a sunscreen scene to a hotel-room encounter—as Olive's impulsive kiss with Adam spirals into something real.
Behind the romantic comedy lies a surprising origin story. People Magazine notes the book began as Star Wars fan fiction called Head Over Feet, written by Hazelwood in 2018 under the pen name Ever-So-Reylo before becoming a published novel. Reneé Rapp's song Messy soundtracks the trailer, adding an indie-pop edge to the promo.
Olive needs to prove something to her best friend Ahn. Yahoo News explains that Olive kisses Adam, a Stanford professor, to show she can handle a long-term relationship. The fake-dating pact that follows serves a dual purpose: it protects Adam's grant funding by making him look less like a flight risk.
Ali Hazelwood didn't start with a published novel. UPI reports the story originated in 2018 as Star Wars fan fiction titled Head Over Feet under the pen name Ever-So-Reylo. The unpublished work later transformed into the 2021 bestseller The Love Hypothesis, proving fan fiction can spark mainstream success.
Sarah Rothschild penned the screenplay adaptation while Elizabeth Cantillon produced the film. FirstShowing confirms Claire Scanlon directed the romantic comedy. The cast also features Rachel Marsh as Ahn and Nicholas Duvernay as Jeremy, rounding out the ensemble around Reinhart and Bateman's central romance.
Promotional materials highlight a clever detail in the kiss scene. The moment includes a visual nod to the original book cover, rewarding fans who know Hazelwood's source material. These touches suggest the filmmakers crafted an adaptation that honors both longtime readers and new audiences discovering the story.
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