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All Her Fault premiered on Peacock in November 2025, starring Sarah Snook and Dakota Fanning

The limited series was adapted from Andrea Mara's 2021 book All Her Fault

Showrunner Megan Gallagher made multiple changes to the overall story line

Warning: All Her Fault spoilers ahead!

All Her Fault is full of twists and turns that even fans of the book couldn't have seen coming.

Released on Peacock in November 2025, the crime drama stars Sarah Snook as Marissa Irvine and Dakota Fanning as Jenny Kaminski, two affluent working mothers whose lives unravel after Marissa's son vanishes from a playdate, and Jenny's nanny, Carrie Finch ( Sophia Lillis ), becomes the prime suspect.

Though the TV series differs in many ways from the book it was based on — written in 2021

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