All Her Fault Cast and Character Guide
All Her Fault is already a popular series on Peacock, captivating audiences since its release on November 6, 2025. This thrilling mystery-drama, adapted from Andrea Mara’s novel, unravels the tense story of Marissa Irvine, whose son Milo disappears after an ordinary playdate.
Plot Overview
The series centers on the Irvine family—Marissa and Peter—and introduces a network of characters whose paths intersect unexpectedly. As secrets surface and relationships strain, parents confront harsh truths about the people they trust with their children.
“Not only does every actor in All Her Fault get their time to shine, but also, during the process, secrets are uncovered, relationships are put to the test, and parents get harsh realities about the people they trust with their kids.”
Main Characters
- Marissa Irvine – A corporate mother from Chicago, portrayed by Emmy-winning actress Sarah Snook.
- Milo – Marissa’s son who suddenly goes missing.
- Peter Irvine – Marissa's spouse and a key family figure.
- Detective Alcaras – The police officer investigating the disappearance, shedding light on the intertwined lives of parents, school mothers, and nannies.
About Sarah Snook
Sarah Snook, who embodies Marissa Irvine, is an acclaimed actress known for her role as Shiv Roy in Succession. Born in Adelaide, Australia, she has also starred in films such as Predestination (2014), Pieces of a Woman (2020), and Run Rabbit Run (2021).
“Marissa Irvine, a corporate mom living in Chicago, is the terrified parent of the Emmy-winning actress Sarah Snook, who was awarded the prize for her outstanding acting performance and who played Shiv Roy in Succession.”
The cast delivers nuanced performances that enrich the suspenseful storyline, making every plot twist in All Her Fault engaging and unpredictable.
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