Ali Hazelwood Writes 'Love Hypothesis' Sequel 'The Two-Body Problem'

Ali Hazelwood announced on Instagram Tuesday morning that "The Two-Body Problem," a sequel to her 2021 novel "The Love Hypothesis," will hit shelves in February 2027. The author also revealed that MRC is developing a film based on the new book for Amazon MGM Studios.

"'I wrote a sequel to The Love Hypothesis' is not a sentence I thought I'd say a year or so ago, but now I weirdly can't imagine a world in which 'The Two-Body Problem' doesn't exist," Hazelwood wrote, sharing the cover of "The Love Hypothesis."

She said she plans to share more in the coming months: "I'm really eager to talk more about this book and how it came about in the next few months. For now let me just say that the 'TLH' movie and its cast made me fall for Adam and Olive all over again, that revisiting them was an absolute pleasure."

The author addressed readers directly about the surprise of an unannounced sequel. "As someone who gets VERY attached to stories and characters, I know that unannounced sequels can be blindsiding, so feel free to skip this book and overwrite it with whatever headcanon you prefer, and I'll see you on the next one!" she wrote.

Hazelwood then broke the film news. Prefacing that "nothing is guaranteed," she confirmed that "MRC is developing" a "Two-Body Problem" movie for Amazon MGM.

"The Love Hypothesis," the first book in the series, became a New York Times bestseller and a BookTok sensation. The romantic comedy follows brainy graduate student Olive Smith, who starts a fake relationship with Adam Carlsen, a fellow scientist and a notoriously harsh professor known as "Dr. Evil" around campus.

Prime Video released the film adaptation on Sept. 23. Lili Reinhart and Tom Bateman starred, with Claire Scanlon directing from a script by Sarah Rothschild.

With the sequel now scheduled for February 2027 and a second film in early development, Hazelwood's scientists-in-love franchise looks set to expand across both publishing and streaming.