“They were right and I was wrong,” screenwriter Christy Hall tells Entertainment Weekly.

Who wants to have an early read of the script and give their thoughts?'"

“They printed off scripts for them, hard copies.

Justin Baldoni and Blake Lively in ‘It Ends With Us’

Justin Baldoni and Blake Lively in ‘It Ends With Us’.Nicole Rivelli/Sony

This was an early draft of mine.

What did you feel like was missing?'”

“And so that was a really remarkable experience early on.”

Blake Lively and Brandon Sklenar star in IT ENDS WITH US

Blake Lively and Brandon Sklenar in ‘It Ends With Us’.Jojo Whilden/Sony

“It was good to test things.”

Better In Boston) to Root, to thematically tie together other important aspects of the story.

“It was fun to test things like, ‘Is that going to massively bum you out?'”

Justin Baldoni and Blake Lively star in IT ENDS WITH US

Blake Lively and Justin Baldoni in ‘It Ends With Us’.Nicole Rivelli/Sony

“And they were like, ‘No, no, no.

We were just wondering why.'”

But there was one edit she made from the book that almost incited a (figurative) riot.

I didn’t have her say, ‘It ends with us.'"

The reaction to her changing that line was swift and intense.

“The entire room of 20 megafans were like, ‘You have to say it!'”

“I was like, ‘I’m sorry, forgive me!

I was testing it out!’

It was like a wall of voices screaming at me, ‘She has to say it!'”

Hall’s defense of why she made the edit didn’t sway any of the fans.

In this movie, she has to,'" she says.

It’s different in this movie.

It actually is now my favorite moment in the film.

It’s so honest, it’s so real, it’s so raw.

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Hall says with a laugh.

“And I was like, ‘I’m so sorry.

I must be absolved of this sin.'”

Thank you for trusting me with your baby.'"

If Colleen doesn’t love it, then it’s like I have failed.

But she said, ‘You did a great job.’

I just didn’t want to let her down."

It Ends With Usopens in theaters Aug. 9.