For Amanda Seyfried, the Peacock limited series offered a rare opportunity to play a character adapted from a book while working closely alongside the author, Liz Moore.

The Allentown native plays a Philadelphia police officer in the Kensington-set show based on Liz Moore's book.

The eight-episode adaptation of Liz Moore's novel tells a story of sisterhood, addiction and murder set in the Kensington neighborhood of Philadelphia.

This article contains spoilers for “Long Bright River,” now streaming on Peacock. Two years before Liz Moore's novel "Long Bright River" ever hit shelves in 2020 and became a bestseller - and one of Barack Obama's top books of the year - she was approached by different producers.

Amanda Seyfried dishes on her new Peacock limited series "Long Bright River" and fulfilling her dream of playing a police officer, including a traffic stop turned sideways during a ride-along with a real cop.

"We can see ourselves in each of these people, and that's the point of storytelling,” Seyfried tells PEOPLE of the show, now streaming on Peacock

Long Bright River is a new Peacock TV show, which is an adaptation of the 2020 book of the same name by Liz Moore. The show is not based on a true story but takes inspiration from the author's life.

If you haven’t heard yet, Amanda Seyfried is starring in a brand new show on Peacock titled Long Bright River. The drama series, which premiered this week on March 13, is already getting rave reviews from critics.