In the four years after its 2016 release, the novel It Ends With Us sold more than a million copies. But then, thanks to exposure on TikTok, the book experienced a massive resurgence, becoming the best-selling novel of both 2022 and 2023, according to Publisher Weekly. That social media-fueled surge made its author, Colleen Hoover, one of the best-known writers among TikTok’s young users. That popularity became instantly apparent to Blake Lively the moment she was contacted about taking one of the lead roles in the movie adaptation of It Ends With Us. And she said she hadn’t been aware of Hoover or her book, but that all changed rather suddenly. (Click on the media bar below to hear Blake Lively)