Love Hypothesis Prime Video lands as a global exclusive on 23 September 2026—Amazon’s rom-com adaptation of Ali Hazelwood’s New York Times best-selling novel, starring Lili Reinhart and Tom Bateman. If you are searching cast lists, the trailer drop, or how to watch three days out, this ADVANCE guide locks the confirmed facts before the premiere spike.
Prime Video first dated the film in June, then refreshed the About Amazon explainer with the official trailer on 26 August. Country availability on the studio press page is listed as worldwide; The Futon Critic’s Amazon release adds the “more than 240 countries and territories” framing for the exclusive stream.
Release date and how to watch
Premiere: 23 September 2026
Platform: Prime Video only (no theatrical window in the materials we cite)
Access: Included with an Amazon Prime membership in markets where Prime Video is available
About Amazon notes U.S. membership pricing context ($14.99 monthly / $139 yearly, with discounted tiers for young adults and qualifying assistance). Treat that as U.S. reference only—local pricing varies.
Cast: who plays Olive, Adam, Ahn and Jeremy
Official cast from About Amazon and Amazon MGM Studios:
Lili Reinhart (*Chemical Hearts*) as Ph.D. candidate Olive
Tom Bateman (*Hedda*) as intimidating professor Adam Carlsen
Rachel Marsh (*Fallout*) as Olive’s best friend Ahn / Anh (press pages use both spellings)
Nicholas Duvernay (*Reminders of Him*) as Olive’s crush Jeremy
The Futon Critic / Amazon release also credits Jaboukie Young-White and Arty Froushan. Directed by Claire Scanlon (The People We Hate at the Wedding); screenplay by Sarah Rothschild, based on Hazelwood’s novel. Produced by Elizabeth Cantillon (studio page also lists Jonathan Golfman).
Plot without spoilers
Official synopsis: Olive is a Ph.D. candidate locked on academia. When she realises best friend Ahn has fallen for her crush Jeremy, she impulsively kisses professor Adam to prove she has moved on. A fake relationship with rules follows; the arrangement blurs; Olive must test whether love is worth the risk. That is the full public pitch—no invented twists beyond studio copy.
Trailer and first-look status
About Amazon’s August update centres the trailer reveal. The June Futon Critic package also flagged first-look stills alongside the date announcement. Check the About Amazon entertainment page or Prime Video’s own title page for the current trailer embed as 23 September approaches.
People also ask: is The Love Hypothesis only on Prime Video?
Yes, according to Prime Video and Amazon MGM Studios materials: it premieres exclusively on Prime Video on 23 September 2026 as a global original movie, not as a same-day theatrical release in the cited sources.
Why this Film releases cluster piece now
Spike date 2026-09-23 sits inside the 7–14 day ADVANCE window. Pair with our live Gandhari on Netflix (https://www.thesundayprofile.com/gandhari-netflix-cast-plot) cast-and-plot hub and Shaque: Trust No One (https://www.thesundayprofile.com/shaque-trust-no-one-netflix) premiere guide—same Film releases cluster, different platforms and territories.
Why Hazelwood’s book-to-screen timing matters
Hazelwood’s STEM-campus romances built a large BookTok and bookseller audience before Hollywood fully caught up. Pairing Reinhart—already associated with intimate YA-adjacent romance via Chemical Hearts—with Bateman’s colder academic foil mirrors the novel’s power imbalance without requiring spoiler-heavy marketing. Scanlon’s prior wedding-party comedy experience also signals tone: broad, studio-safe rom-com rather than micro-budget indie.
For dual-geo readers, the September 23 global exclusive matters more than a staggered theatrical rollout. India, the UK, and North America search the same English keyword cluster (“Love Hypothesis Prime Video,” “Olive Adam cast”) in the days before launch—exactly the ADVANCE window this desk targets.
Secondary titles to watch beside it
About Amazon cross-sells other Prime romances (The Map That Leads to You, The Idea of You, Red, White & Royal Blue). Those are catalogue context, not sequels. Keep this piece focused on the Hazelwood adaptation’s cast, date, trailer, and exclusive stream path.
Sources: About Amazon entertainment note (trailer update 26 Aug 2026); The Futon Critic Amazon MGM Studios release (11 Jun 2026); Amazon MGM Studios press page for The Love Hypothesis. Cast names and plot follow those materials only.