All Her Fault Cast and Character Guide
All Her Fault is the latest sensation on Peacock, captivating audiences with its gripping mystery-drama. Released on November 6, 2025, the series is adapted from Andrea Mara's novel and follows Marissa Irvine as she faces the terrifying disappearance of her son Milo after a routine playdate.
Plot Overview
The story revolves around the Irvine family—Marissa and Peter—and the interconnected lives of other characters. As secrets emerge and relationships are challenged, parents confront harsh truths about those they trust with their children. Detective Alcaras leads the investigation into the disappearance, delving into the lives of Marissa, Peter, school mothers, and nannies.
“All Her Fault explores how ordinary people cope with extraordinary situations.”
Main Characters and Cast
- Marissa Irvine – A corporate mother from Chicago, portrayed by Sarah Snook.
- Peter Irvine – Marissa’s husband and father of Milo.
- Detective Alcaras – The police investigator in charge of the case.
- Various school mothers and nannies involved in Milo's life, whose stories intertwine as the mystery unfolds.
About Sarah Snook
Sarah Snook, the Emmy-winning actress playing Marissa Irvine, gained acclaim for her role as Shiv Roy in Succession. Born in Adelaide, Australia, she has also starred in films including Predestination (2014), Pieces of a Woman (2020), and Run Rabbit Run (2021).
“Snook was awarded the Emmy for her outstanding acting performance.”
The talented cast brings depth and nuance to the series, making every plot twist unpredictable and engaging.
Author’s summary: “All Her Fault” combines strong performances and a suspenseful storyline to explore the fragility of trust and the impact of secrets on families.