'Riverdale' Star's Announcement About New Movie Role Stirs Excitementoriginally appeared onParade. Lili Reinhart announced some exciting newson her Instagramon Wednesday. TheRiverdaleactress posted a selfie of her wearing a lab coat while holding Ali Hazelwood's popular YA book,The Love Hypothesis.According toDeadline, Reinhart is set to star and serve as an executive producer for the film, which will be produced by Amazon MGM Studios and MRC. The novel follows Olive Smith, a Ph.D. candidate who fakes a relationship with a young and hot professor, Adam Carlsen, to convince her best friend that she's moved on. Adam agrees to the arrangement to further his own career goals. Their fake relationship eventually blossoms into something real as they navigate the challenges of academia and their feelings for each other. The Love Hypothesiswill be directed by Claire Scanlon, while the script will be written by Sarah Rothschild. Elizabeth Cantillon will serve as a producer, while Hazelwood and Catherine Hagedorn will serve as executive producers alongside Reinhart. The 28-year-old actress posted this picture to her Instagram with the caption "👀🧬❤️ #thelovehypothesis," plus a screenshot of theDeadlinearticle. View this post on Instagram A post shared by Lili Reinhart (@lilireinhart) Fans and friends of the actress and theNew York Timesbest-selling author expressed their excitement all over social media. "I LOVE THE BOOK SO MUCH AND I CANNOT WAIT TO SEE YOU AS OLIVE!!🥹🫶🏻," a fan account dedicated to Reinhart wrote. Another fan said, "I've never been more excited for a book to screen adaptation 😝." "OMG WHATTT?????", a user commented. "WHOS PLAYING ADAM????" "I'm seated. The theater employees are scared and asking me to leave because it 'hasn't started filming yet' but I'm simply too seated,"Film Updatescommented on Instagram. "Could not be more perfect for this," another fan commented. "I'm so seated🫡❤️👏🏽." Reinhart'sRiverdaleco-star, Madelaine Petsch, even expressed her excitement, commenting "ahhhh i loved this book im so excited." Camila Mendes, another one of herRiverdaleco-stars, also joined the conversation, writing "that's my girllll." Though there is no official release date for the film yet, fans cannot wait for Hazelwood'sThe Love Hypothesisto hit the big screen. 'Riverdale' Star's Announcement About New Movie Role Stirs Excitementfirst appeared on Parade on Jul 16, 2025 This story was originally reported byParadeon Jul 16, 2025, where it first appeared.