‘The Love Hypothesis’ Release Date, Time, Cast, Trailer, Plot and Everything Fans Need to Know Before Olive and Adam Hit Prime Video

Ali Hazelwood’s beloved STEM rom-com is finally jumping from the page to the screen, and the internet has been counting down every single day. The romance world took notice back in 2021 when Hazelwood’s debut novel took off, and she’s since built a devoted fanbase around stories of women in science falling for tall, brooding men who secretly can’t stop thinking about them.

Now ‘The Love Hypothesis‘ is getting the adaptation treatment fans have been begging for since it was first announced, and the streaming date, full cast, and trailer are all out in the wild. Here’s the breakdown of everything confirmed so far.

‘The Love Hypothesis’ Release Date and Where to Watch

‘The Love Hypothesis’ is set to premiere on September 23, 2026. Rather than a theatrical run, the movie is headed straight to streaming, landing on Prime Video for fans to watch from home.

The film streams globally on Prime Video, with Lili Reinhart and Tom Bateman starring as the two scientists who end up entangled in a fake relationship. Prime Video made the announcement official back on June 11, posting a teaser caption hinting something was brewing before confirming the September arrival, and fans immediately clocked that the release lands right in the middle of pumpkin spice latte season.

Reinhart later confirmed filming had wrapped through a TikTok video, in which she and Bateman playfully reenacted a farewell scene from ‘The Office.’ That kind of behind the scenes chemistry has only fueled more excitement heading into premiere week.

‘The Love Hypothesis’ Cast Led By Lili Reinhart and Tom Bateman

Lili Reinhart takes on the role of Olive, a brilliant PhD candidate focused on her future in academia, while Tom Bateman plays Adam, the intimidating professor she ends up entangled with. Reinhart is best known to audiences from her time on ‘Riverdale,’ and fans have called her casting close to perfect for Olive’s energy.

Once the two leads were announced, fans online were reportedly desperate to see the pairing come to life on screen, especially given how beloved the Olive and Adam dynamic already is among readers. The chemistry teased in early footage has only added to the anticipation.

Rounding out the cast is Rachel Marsh as Olive’s best friend Ahn and Nicholas Duvernay as Olive’s crush Jeremy. Jaboukie Young-White and Arty Froushan also join the ensemble, playing Malcolm and Tom respectively.

The movie is directed by Claire Scanlon and written by Sarah Rothschild, based on Hazelwood’s novel. Hazelwood herself is credited as an executive producer alongside Elizabeth Cantillon, who also produces.

‘The Love Hypothesis’ Plot Explained

The story kicks off when Olive, in an attempt to convince one of her best friends that she has moved on, impulsively kisses Dr. Adam Carlsen, a professor known around campus for being difficult. After she realizes her best friend Ahn has fallen for her own crush Jeremy, Olive uses the kiss with Adam as a way to prove she is unavailable.

What starts as one impulsive moment turns into an arrangement where Olive and Adam agree to fake date for reasons that benefit them both. The setup comes with its own rules and boundaries, structured as a mutually beneficial agreement between two people who insist they have no interest in actually falling for each other.

Naturally, the lines between performance and reality begin to blur, forcing Olive to confront whether love might be worth the risk after all. It is the classic grumpy meets sunshine setup that made the novel such a hit with romance readers in the first place.

Interestingly, the source material has roots in fan fiction, having originally started as a 2018 Reylo fanfic before Hazelwood reworked it into the contemporary romance readers know today. Even Adam’s name is a nod to that origin, referencing Adam Driver, who played Ben Solo in the ‘Star Wars’ sequel trilogy.

‘The Love Hypothesis’ Trailer Breakdown

Prime Video first debuted a teaser for the movie at its Obsessed Fest event, giving fans an early glimpse before the full trailer dropped weeks later. The official full length trailer arrived on August 26, teasing several fan favorite book moments.

Among the scenes teased are Olive and Adam’s first kiss, the much discussed sunscreen moment that book readers will instantly recognize, and the pair’s hotel room sleepover. The trailer shows Olive’s plan taking shape, starting with the impulsive kiss with the professor some fans jokingly refer to as Dr. Evil, and building toward the wild fake dating arrangement that follows.

In one moment from the footage, Olive can be heard telling Adam in his office, while giggling, that they are officially fake dating. The trailer notably ends right before what many consider one of the most iconic sections of the book, the science conference chapters, which seems like a deliberate choice to leave fans wanting more.

Overall, the footage sticks closely to the central fake dating setup and the push and pull dynamic between Olive and Adam that defines the novel. Of course some changes are expected in any adaptation, but with Hazelwood involved as an executive producer, longtime readers seem cautiously optimistic that the heart of the story will stay intact.

With the release date locked in and the full trailer finally out, all that is left is the wait. Now that Olive and Adam’s fake dating saga is about to play out on screen, which book moment are you most nervous, or most excited, to see Reinhart and Bateman bring to life first?