All Her Fault Cast and Character Guide
The Peacock thriller All Her Fault, based on Andrea Mara’s novel, premiered on November 6, 2025, and has quickly become a hot topic. The show immerses viewers in an unsettling mystery where Marissa Irvine discovers her son Milo has disappeared after what seemed like an ordinary playdate.
As the story unfolds, buried secrets come to light, relationships are strained, and parents face shocking truths about the people they trust. The drama focuses on Marissa and Peter Irvine’s family and intertwines their story with others whose fates intersect in surprising ways.
Main Characters
- Marissa Irvine – A busy corporate mother living in Chicago, portrayed by Sarah Snook.
- Peter Irvine – Marissa’s husband, whose calm façade hides deeper worries.
- Detective Alcaras – The investigator tasked with uncovering what really happened to Milo.
About the Cast
The talented cast brings emotional depth and tension to every scene, turning each twist into an unpredictable experience.
“Sarah Snook delivers a gripping portrayal as Marissa Irvine, capturing the raw fear and desperation of a mother in crisis.”
Snook, an Emmy-winning actress best known for her role as Shiv Roy in Succession, was born in Adelaide, Australia. Her career also includes standout performances in Predestination (2014), Pieces of a Woman (2020), and Run Rabbit Run (2021).
Author’s Summary
This gripping adaptation merges emotional depth and mystery, powered by Sarah Snook’s outstanding performance that transforms a mother’s nightmare into haunting drama.