Jessica Chastain as Beverly Marsh, The Cast of the It Sequel Is Finally Taking Shape! Meet the Stars

Chastain was always a pretty solid guess when it came to adult Beverly. After all, she worked with It director Andy Muschietti on the 2013 horror film Mama.
It's been a while since the It sequel was confirmed (and titled It: Chapter Two), and there are a lot of things to figure out before the next part of the story

Jessica Chastain might star in the It sequel

As Expected, Jessica Chastain is Confirmed To Be in Talks For IT: CHAPTER 2 — GeekTyrant

IT Chapter 2: Jessica Chastain In Talks For Beverly Marsh

Jessica Chastain demanded more blood and gore for IT Chapter 2

It Chapter 2: Everyone who's been cast as the grown-up Losers

Jessica Chastain as Beverly Marsh, The Cast of the It Sequel Is Finally Taking Shape! Meet the Stars

It' Girl? Jessica Chastain Is Bent on Playing Beverly Marsh in Sequel (Video) - TheWrap

It' Chapter Two: Jessica Chastain Confirmed to Star as Beverly

Fan's Kid/Adult Losers' Club Mashup Photos Highlight Perfect 'IT: Chapter 2' Casting - Bloody Disgusting

Jessica Chastain - Wikipedia

Did James McAvoy Wear A Rolex In 'It Chapter Two'?

Jessica Chastain Teases Her Possible Transformation for IT: Chapter Two - IGN