As if 2026 hasn’t been kind enough to us book girlies, September is bringing the harbinger of a highly anticipated era: the Ali Hazelwood adaptation. Hazelwood’s STEM romances have captured the hearts of readers everywhere, and for the first time, her books are getting the Hollywood treatment with the upcoming The Love Hypothesis movie, starring Lili Reinhart as Olive Smith and Tom Bateman as Adam Carlsen, releasing September 23, 2026, on Prime Video.
We have a little while longer to wait until the film is finally in our hands, but I’m here to ensure you’re armed with every bit of The Love Hypothesis movie information that’s dropped so far. Ahead, everything we know about The Love Hypothesis adaptation, plus a first look at Olive and Adam’s romance.
When does The Love Hypothesis movie come out?
The Love Hypothesis movie releases on September 23, 2026, on Prime Video. If Prime Video’s past adaptations like The Summer I Turned Pretty and Off Campus are any indication, we’re in for a fabulous viewing experience.
What is The Love Hypothesis movie about?
The Love Hypothesis follows Olive, a Ph.D. candidate, as she gets unexpectedly caught in a whirlwind fake-dating scheme. When Olive’s best friend confesses feelings for Olive’s crush, Olive wants nothing more than to convince her that she’s completely moved on—even if that means impulsively kissing moody professor Adam Carlsen. The kiss quickly turns into a full-on fake-dating relationship to keep up their ruse, but as real feelings start emerging, things get complicated fast.
The Love Hypothesis movie cast
Lili Reinhart as Olive Smith
Most known for her iconic role as Betty from Riverdale, Lili Reinhart is honestly the perfect Olive. From what the trailer shows, Olive and Adam’s chemistry will be just as sizzling as it is in the book.
Tom Bateman as Adam Carlsen
With an adaptation this highly anticipated and a couple as beloved as Olive and Adam, to say the internet was on the edge of its seat to see who would be cast as Adam Carlsen would be an understatement. But from the second these two were announced, the internet has been dying to see them on our screens.
The supporting cast
- Rachel Marsh as Anh
- Nicholas Duvernay as Jeremy
- Jaboukie Young-White as Malcolm
- Arty Froushan as Tom
The Love Hypothesis trailer
Prime Video debuted the first teaser for The Love Hypothesis movie at its Obsessed Fest event, and after a few weeks of dying for more, we finally have a full trailer. And, yes, it includes the kiss that starts it all. It also ends right before perhaps the most iconic chapters of the book, when Adam and Olive are at a science conference. It’s safe to say Prime knew what they were doing with that one. From the trailer alone, fans can’t help but already fangirl over the chemistry between our two leads.
Is The Love Hypothesis movie based on a book?
Yes! If you’ve somehow avoided the Ali Hazelwood craze, let me introduce you to your new favorite romance author. After soaring to popularity with her 2021 bestselling novel The Love Hypothesis on BookTok, Hazelwood’s STEM romances (and beyond) have become an integral part of the romance genre. Known for her signature banter, swoon-worthy couples, and bingeable reads, The Love Hypothesis is definitely worth the read before it’s streaming.
Will The Love Hypothesis movie be accurate to the book?
The trailer includes several fan-favorite moments from the novel and seems to stick to the central fake-dating setup and Olive and Adam’s dynamic in the book. Of course, adaptations always have to make some changes, but with Ali Hazelwood executive producing, we can trust that the story is in good hands.
How to watch The Love Hypothesis movie
Release date: September 23, 2026
Where: Prime Video
Release type: Streaming movie
Availability: Global
Lauren Blue, Editor & Book Club Co-Host
As an Editor for The Everygirl, Lauren ideates and writes content for every facet of our readers’ lives, from must-read books and behind-the-scenes interviews to beauty products she can’t live without. When she isn’t sitting in an AMC watching the latest buzzy release, she can be found scouring Goodreads for the perfect pick for The Everygirl Book Club. There, she co-hosts discussions with members, debating plotlines, fancasting characters, and, of course, tossing in her own recommendations.
The post ‘The Love Hypothesis Movie’: Release Date, Cast, Trailer, and Plot—Everything We Know About the Adaptation appeared first on The Everygirl.
