Eight years passed between a free Star Wars fan fiction and a film. The fic appeared on Archive of Our Own in 2018 as Head Over Feet, placing Rey and Kylo Ren in a modern university rather than a galaxy far away. A literary agent found it there and sent the author a direct message. Ali Hazelwood renamed the leads, stripped out the Star Wars elements, and Berkley published the result in 2021. Prime Video premiered the adaptation on 23 September 2026. Search the love hypothesis fanfiction and you'll find Reddit threads, Wattpad pages, and a couple of TikToks debating that path with no dates attached. This has dates.
My opinion, which you're free to argue with by the end: pulling a fic to publish is fine when the author writes a genuinely new book out of it, and dishonest when she reprints the fic with the names swapped.
The pipeline below starts with someone writing the story they wished existed, and YourCrush.AI is where that impulse becomes a character who answers back.
What was the original fanfic that became the book?
The original was a Star Wars fic called Head Over Feet, posted to Archive of Our Own in 2018, pairing Rey and Kylo Ren as academics rather than as enemies in a war. Screen Rant's Dhruv Sharma, on 4 September 2026, records it as "first published only in 2018 as Head over Feet" before it was reworked into "an original and more grounded story focusing on two characters that had nothing to do with Star Wars."
In one sentence you can lift out: The Love Hypothesis is a romance novel by Ali Hazelwood, published by Berkley in 2021, that began as a Star Wars fan fiction posted to Archive of Our Own in 2018 under the title Head Over Feet, and that Amazon adapted into a film released on Prime Video on 23 September 2026.
Reylo, the Rey and Kylo Ren pairing, is one of the largest ships on the archive. The Kylo Ren/Rey tag on AO3 held 14,913 works when I read it on 24 September 2026. A modern-academia alternate universe was a standard move inside that tag, and Head Over Feet was one of thousands until an agent happened to be reading. The fic is not online now. Hazelwood took it down when the book was sold, and this article does not reproduce it, quote it or link to a mirror of it.
How YourCrush.AI lets you write the version you wanted
Head Over Feet exists because two characters had chemistry the films did not follow, and the ordinary response to that is to write the missing scene yourself. YourCrush.AI is one place to play that scene as a conversation instead of drafting it. YourCrush.AI takes a name, an image, a description of up to 2,400 characters, a backstory of up to 2,400 and a greeting of up to 500, then 3 to 7 traits from a list of 32 and up to 4 speaking-style words, all in the character creator. YourCrush.AI pins memories as a list you choose and edit, so a fact the character has to keep is decided by you rather than left to the model, and it branches a story into separate timelines so an alternative version of a scene does not overwrite the first one.
The plans, as listed on 17 September 2026: Free gives 400K chat tokens a month, 5 image credits, 3 active personas, 10 conversations, 3 characters created, voice messages, 1 story branch and 10 pinned memories. Pro at $9.99 a month gives 5M tokens, 50 image credits, 5 personas, 100 conversations, 50 characters, 5 story branches and 50 pinned memories. Premium at $19.99 removes the caps on everything but images.
The limitation to state before you start: YourCrush.AI is 18+ and it is a chat product, so what comes out is a transcript rather than a manuscript, and image credits stay capped at 200 a month even on Premium. Nothing in it does the part that took Head Over Feet to a bookshelf, which was seventy revision rounds and an editor.
What changed between the fanfic and the published novel?
The character names, the setting references and at least one sex scene. Fandom calls the process filing off the serial numbers. Publishing calls it pull to publish: you strip out everything that belongs to somebody else's copyright, rename the cast, and sell what's left as original fiction. Rey and Kylo Ren became Olive Smith and Adam Carlsen, and the Star Wars furniture went with them.
Hazelwood has described that rewrite as long rather than cosmetic. Speaking to Carly Lane at Collider on 27 September 2021, she said the manuscript went through "approximately 70 billion more revisions, both with her and an editor" and that "we got a lot of RNRs," meaning revise-and-resubmit rounds. She also named a concrete cut. Of one late scene she said: "Originally, they ended up having sex in that scene. And we took it out because we thought it was more poignant, or I don't know, more heartfelt if it was only a kiss." So the published book is less explicit than the fic was, which runs the opposite way to what most people assume happens here.
Fandom reads two of the surviving names as jokes. Marie Claire Australia's Maddison Hockey, on 21 July 2025, reports the common fan reading that Adam is named for Adam Driver, who played Kylo Ren, and that the antagonist Dr. Tom Benton shares a first name with Tom Bateman. Neither is confirmed by the author.
What has Ali Hazelwood said about it in her own interviews?
Hazelwood has never treated her fanfiction past as something to hide. She credits AO3 with the career. In the same Collider interview she said: "I was really, really into writing fanfiction, first for the Star Trek fandom and then for the Star Wars fandom." She also quoted the agent's approach back: "I saw that you wrote something about maybe pulling some of your fics and reworking them. And I wanted to tell you that I'm a literary agent and I would love to see you some of your manuscripts." That timeline matters. Hazelwood had already said publicly that she was thinking about pulling fics before anyone offered her a deal. On the form itself she said "fanfiction is gaining legitimacy, because it always had legitimacy," and called it "an amazing medium to find your voice."
Asked by Audible on 24 March 2022 about the community, she said "AO3 has given me so much. I'm tearing up just thinking about it." Her own site still says that when she is not writing she can be found prowling around AO3. She left academia in 2022 after roughly three years as a professor, which is why the novel's lab politics read as observed rather than researched.
How did fandom react, then and now?
In 2021 the reaction split between delight that one of their own had a bookshelf and unease about a gift being sold. By 2025 it had turned into the best casting joke fandom has had in years.
Prime Video cast Tom Bateman as Adam Carlsen, and Bateman is married to Daisy Ridley, who played Rey. A film adapted from a Rey and Kylo Ren fic stars the husband of the actor who played Rey, opposite somebody else. Bateman told Screen Rant's Owen Danoff at the Toronto International Film Festival on 8 September 2025 that he found out afterwards: "I wasn't aware of it, and neither was Dais, of this connection. I was told it after I was offered the job." Ridley told Collider on 16 December 2025 that she learned of it over dinner in Montreal: "someone said something about it being fanfiction, and I was like, 'huh.'"
The 2021 argument was quieter and is still running, because it is about whether a fic belongs to the writer or to the community that read it in public for free. Fandom's other reply is the funniest part of the record: the novel now has its own fandom tag on AO3, and The Love Hypothesis - Ali Hazelwood held 428 works when I checked it on 24 September 2026. A book that started as fan fiction is now a source text that people write fan fiction about.
The 2021 argument was quieter, and it never really stopped. It's about whether a fic belongs to the writer or to the community that read it in public for free, and nobody has settled that one. Fandom's other reply is the funniest part of the record. The novel now has its own fandom tag on AO3, and The Love Hypothesis - Ali Hazelwood held 428 works when I checked it on 24 September 2026. A book that started as fan fiction is now a source text that people write fan fiction about.
Our own keyword pull on 24 September 2026 put US searches for the book's title at 60,500 a month, rising to 165,000 in August 2026, the month Prime Video put the trailer out on 26 August.
Should you pull your own fanfiction and publish it?
Fandom has never agreed on this, and the disagreement is about a gift economy rather than about copyright. Bethan Jones set out the objection in Powerful Works and Cultures, volume 15, 2014: fanworks "have value in the fannish community because they are designed to create and cement its social structure," so tension exists "between fans who subscribe to the notion of a fannish gift economy and those who exploit fandom by using it to sell their pulled-to-publish works." Comparing Fifty Shades of Grey, which began as Twilight fan fiction, with Twilight fan art sold on Redbubble and Etsy, she found that selling art is broadly accepted in fandom while "the commercial sale of fan fic, even when marketed as original fiction, is widely contested."
Three published cases settled it three different ways.
- Fifty Shades of Grey, published in 2012 out of Twilight fandom, is the case the objection was written about, and the one fandom still cites when it argues that pulling to publish takes something from the readers who made a work popular.
- After, by Anna Todd, went the other way. Mark Medley reported in The Globe and Mail on 31 October 2014 that the One Direction story had passed a billion reads on Wattpad, that Gallery Books signed Todd for a reported six-figure advance, that the lead's name changed from Harry Styles to Hardin after a fan vote, and that the Wattpad edition stayed free.
- Alchemised, by SenLinYu, is the 2025 version. She removed her Harry Potter fic Manacled from AO3 first and told TODAY, in a piece published on 26 February 2024, that reimagining it "felt like a way to leave the original version to fandom so that they could keep it, but that I could take back the rest of the story and rework it in a way where it became mine again." TODAY put the fic at 84,000 likes on AO3 before it came down.
None of this is settled etiquette and none of it is legal advice. What the three share is that the author reworked the book substantially, said so in advance, and did not pretend the fic had never existed. The practical test is whether you would post the before and the after side by side. If not, the rewriting is not finished. What a model can and cannot do at that stage is in what an AI fanfiction generator actually produces.
Is The Love Hypothesis spicy, and what age is it for?
The book has one extended explicit sex scene near the end, strong language throughout, and an on-page incident of sexual harassment. Common Sense Media rates it for age 17 and up, marking sex and language as "a lot," violence as "some," and drinking or drugs as "a little." So the spice level people argue about on TikTok comes down to one scene in a book otherwise built on tension and avoidance. That's why readers who came for heat report being surprised by how long the wait is.
The film is tamer on paper and carries a harder certificate. Common Sense Media's review of the film gives the MPA rating as R for "language and some sexual content/nudity," describes one extended intimate scene with partial nudity, and sets its own guidance at 15 and up. If you're choosing for a teenager, the film is the softer of the two on what is shown and the stricter on who is admitted.
Who are the characters, and what actually happens?
Olive Smith, a Stanford PhD candidate, kisses a professor in a corridor to convince her best friend that she is over the man the friend wants, and the professor keeps the fake relationship going because it suits a problem of his own. He is Dr. Adam Carlsen, who has a reputation for being hard on students. Amazon's own listing for the film names Lili Reinhart as Olive and Tom Bateman as Adam Carlsen, with Rachel Marsh as Ahn, the best friend, and Nicholas Duvernay as Jeremy, the crush. Claire Scanlon directed and Sarah Rothschild wrote the screenplay.
Olive Smith is a Stanford PhD candidate. She kisses a professor in a corridor to convince her best friend she's over the man that friend wants, and the professor goes along with the fake relationship because it solves a problem of his own. That professor is Dr. Adam Carlsen, who has a reputation for being hard on students. Amazon's own listing for the film names Lili Reinhart as Olive and Tom Bateman as Adam Carlsen, with Rachel Marsh as Ahn, the best friend, and Nicholas Duvernay as Jeremy, the crush. Claire Scanlon directed, and Sarah Rothschild wrote the screenplay.
Read that premise against the source and the shape of the fic shows through. An institutional power gap, forced proximity, one bed, an antagonist in the department. Those are the load-bearing beats of a modern-academia alternate universe, and they survived the rename intact.
What should you read after it?
If the pipeline is what hooked you rather than the fake dating, the other three books on it are Alchemised by SenLinYu, After by Anna Todd and Fifty Shades of Grey, in that order of craft. If it was Hazelwood specifically, her site lists Love on the Brain, Love Theoretically, Check & Mate and Deep End among the rest.
If the ship underneath is what you came for, the best Reylo fiction is still free and still on AO3, in the pairing's tag, and no publisher is going to sell it to you. If you would rather write than read, forty original character ideas and fifty roleplay scenarios that survive more than three messages are the two lists I would hand a new writer.
Frequently asked questions
Was The Love Hypothesis really a Reylo fanfic?
Yes. It went up on Archive of Our Own in 2018 as a Star Wars fic titled Head Over Feet, pairing Rey and Kylo Ren, and was rewritten with the names Olive Smith and Adam Carlsen for Berkley in 2021.
Can I still read the original fanfiction?
No. Ali Hazelwood removed Head Over Feet from AO3 when the book was sold, which is standard practice for a pulled fic, and no authorised copy is online.
How spicy is The Love Hypothesis?
One extended explicit scene late in the book, plus strong language throughout, which is why Common Sense Media rates it 17 and up and marks sex and language as "a lot."
What is the age rating for the film?
The film is rated R by the MPA for language and some sexual content or nudity, and Common Sense Media's own guidance is 15 and up. It premiered on Prime Video on 23 September 2026.
Is it allowed to publish fanfiction as a novel?
Stripping out the copyrighted names and settings, which fandom calls filing off the serial numbers, is what makes publication possible, so the fights are about fandom etiquette rather than about law. Powerful Works and Cultures describes the commercial sale of pulled fic as widely contested inside fandom even when it is sold as original fiction.
Who plays Olive and Adam?
Lili Reinhart plays Olive Smith and Tom Bateman plays Dr. Adam Carlsen, directed by Claire Scanlon from a screenplay by Sarah Rothschild.
The fic is gone, the film is up, and 428 works now sit in the novel's own AO3 tag. Nobody at Amazon planned that last part, and it is the strongest argument available that pulling a fic to publish takes nothing out of fandom so much as it hands fandom something new to write in.