My understanding is that Colleen Hoover's books are like the "Twilight" series for millennials.

BookTok (Book TikTok for singles) is chock full of videos about the author, especially "It Ends With Us," a #1 New York Times bestseller first published in 2016.

Like Twilight, people have strong opinions about Colleen Hoover (or CoHo, I guess). They are either completely obsessed with everything she has written or repulsed by the mention of her name.

That's why the news that Blake Lively will star as Lily Bloom in the film adaptation of "It Ends With Us" has sparked such controversy among people. [According to E! News, Lively will co-star with Justin Baldoni as Lyle Kincaid.

First, some people are genuinely happy about the casting decision.

"Blake is alive and well as Lily Bloom," one person tweeted. Some.

"Blake Lively is trying to make 'IT ENDS WITH US' an Oscar-winning movie."

Another wrote, "Blake Lively is trying to stop Colleen Hoover from doing the movie," with a clip from the film.

Many people seem to hate Colleen Hoover for sport, while others claim that her book glorifies abusive relationships (an accusation, incidentally, also directed at "Twilight" author Stephenie Meyer).

"I am disappointed in Justin Baldoni and Blake Lively. Colleen Hoover's book romanticizes abusive relationships.

Meanwhile, on BookTok, fans of Hoover's book had already cast Lily Bloom and Lyle Kincaid, and all seem to think the role should have gone to Abigail Cowen and Theo James.

Sorry, I have no opinion.