The Love Hypothesis Movie: Cast, Release Date & Everything to Know

The Love Hypothesis movie is finally coming to the screen.

The romantic comedy adaptation of Ali Hazelwood’s bestselling novel stars Lili Reinhart as Olive Smith and Tom Bateman as Adam Carlsen. The movie is scheduled to premiere globally on Prime Video on September 23, 2026.

If you’re wondering when The Love Hypothesis movie comes out, who is in the cast, whether there is a trailer, and how to watch it, here’s everything you need to know.

When Does The Love Hypothesis Movie Come Out?

The Love Hypothesis premieres on Prime Video on September 23, 2026.

Amazon confirms that the movie will stream globally on Prime Video. Amazon is also currently advertising a 30-day free trial for eligible new members.

How to Watch The Love Hypothesis

The movie will be available exclusively on Prime Video.

🎬 Watch The Love Hypothesis on Prime Video →

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What Is The Love Hypothesis Movie About?

The Love Hypothesis is based on Ali Hazelwood’s bestselling romance novel.

The story follows Olive Smith, a Ph.D. candidate focused on her academic career. When Olive realizes that her best friend Ahn is interested in Olive’s crush, Jeremy, she impulsively kisses Adam Carlsen, an intimidating professor.

The unexpected kiss leads to a fake relationship.

What starts as an arrangement between Olive and Adam gradually becomes more complicated as their pretend relationship begins to feel increasingly real.

The story combines fake dating, academia, romance, and comedy, with Olive and Adam’s pretend relationship at its center.

The Love Hypothesis Movie Cast

The main cast includes:

Lili Reinhart as Olive Smith
Tom Bateman as Adam Carlsen
Rachel Marsh as Ahn
Nicholas Duvernay as Jeremy
Jaboukie Young-White
Arty Froushan

The film is directed by Claire Scanlon and written by Sarah Rothschild, based on Hazelwood’s novel. Amazon MGM Studios is the studio behind the movie.

Lili Reinhart as Olive Smith

Lili Reinhart plays Olive, the Ph.D. candidate whose impulsive decision sets the story in motion.

Olive is ambitious and focused on her future in academia, but her plans become complicated after her unexpected interaction with Adam.

Tom Bateman as Adam Carlsen

Tom Bateman plays Adam Carlsen, the intimidating professor who becomes Olive’s fake boyfriend.

Adam’s reputation within the department makes Olive’s decision to involve him in her fake relationship particularly unexpected.

Is There a Trailer for The Love Hypothesis?

Yes.

Prime Video has released an official trailer for The Love Hypothesis. Amazon’s official announcement describes the movie as a romantic comedy adaptation starring Reinhart and Bateman.

The trailer gives viewers a look at Olive and Adam’s relationship and the fake-dating arrangement at the center of the story.

You can also find the trailer directly on the official Prime Video listing.

Watch the official trailer on Prime Video before the movie premieres.

Is The Love Hypothesis Movie Based on a Book?

Yes.

The movie is based on Ali Hazelwood’s The Love Hypothesis, the New York Times bestselling romance novel.

The movie follows the central premise of the book: Olive and Adam enter a fake relationship that gradually becomes more complicated as their feelings develop.

For readers who haven’t read the novel yet, the movie also creates an opportunity to discover the original book.

Want to Read The Love Hypothesis Before Watching?

If you’d like to read Ali Hazelwood’s novel before watching the adaptation, you can find The Love Hypothesis on Amazon.

📚 Read The Love Hypothesis on Amazon →

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The Love Hypothesis Book vs. Movie

One of the biggest questions for readers will be how closely the movie follows the novel.

The central story remains the same: Olive needs to navigate her complicated situation, Adam becomes involved in a fake relationship, and the arrangement starts developing into something more genuine.

However, readers should expect some differences.

A movie has considerably less time than a novel to explore characters, internal thoughts, side characters, and smaller relationship moments.

That means some scenes may be shortened, combined, rearranged, or removed in the adaptation.

For readers who already love Hazelwood’s novel, the interesting question will be how the filmmakers translate Olive and Adam’s relationship from the page to the screen.

Where Can You Watch The Love Hypothesis?

The Love Hypothesis is coming exclusively to Prime Video on September 23, 2026.

The current Prime Video listing also displays a 30-day free trial option, with terms applying. Eligibility and availability can depend on the viewer’s location and Amazon account.

Watch The Love Hypothesis

🎬 [Watch The Love Hypothesis on Prime Video →]

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The Love Hypothesis Movie Quick Facts

Detail	Information
Movie	The Love Hypothesis
Based on	Ali Hazelwood’s novel
Release date	September 23, 2026
Streaming	Prime Video
Olive Smith	Lili Reinhart
Adam Carlsen	Tom Bateman
Director	Claire Scanlon
Screenwriter	Sarah Rothschild
Studio	Amazon MGM Studios
Genre	Romantic comedy
Runtime	1h 52m
Rating	R

The current Prime Video listing gives the film a runtime of 1 hour 52 minutes and an R rating, with content warnings for language, sexual content and some nudity.

Should You Read The Book Before Watching The Movie?

You don’t have to read the novel first.

But if you’re a reader who enjoys comparing books with their movie adaptations, reading The Love Hypothesis beforehand gives you a chance to notice which characters, scenes and relationship details make the transition from page to screen.

And if you prefer to watch the movie first, you can always read the novel afterward and compare the two versions.

Why Is The Love Hypothesis Movie Getting So Much Attention?

The movie combines several elements that have already made the book popular with romance readers:

Fake dating
Workplace/academic romance
Opposites-attract dynamics
A bestselling romance novel as source material
A major streaming adaptation
Lili Reinhart and Tom Bateman in the lead roles

Amazon itself describes the film as an adaptation of Hazelwood’s bestselling novel and highlights the fake-relationship premise in its September Prime Video lineup.

Final Thoughts

The Love Hypothesis is arriving on Prime Video on September 23, 2026, bringing Ali Hazelwood’s popular romance story from the page to the screen.

With Lili Reinhart as Olive Smith and Tom Bateman as Adam Carlsen, the movie centers on the same fake-relationship premise that drives the original novel.

Whether you’re discovering the story for the first time or you’ve already read the book, the movie gives you a new way to experience Olive and Adam’s relationship.

Ready to watch?