Biggest Differences Between Peacock's ‘All Her Fault’ Show and the Book

Peacock’s All Her Fault is a mysterious and fast-paced mystery series — but how does the TV adaptation compare to the original book?

Based on a novel by Andrea Mara, All Her Fault follows a mother named Marissa (Sarah Snook) whose son, Milo, disappears from his first playdate. The search for Marissa’s child uncovers secrets about those closest to her, with everyone becoming a suspect in the kidnapping.

The series, which premiered in November 2025, captured our attention — as did the revelation that not all events on screen occurred on the page. Stars Abby Elliott and Daniel Monks spoke exclusively to Us Weekly about making changes for the sake of the show.

“For me with the novel, I started reading, and their Brian seemed unrecognizable from the one that Megan had written,” Monks, who pl