- - The 'All Her Fault' Cast Has Stars from 'Succession,' 'The White Lotus,' 'Twilight,' and More

Naomi MayNovember 13, 2025 at 10:36 PM

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Meet the Cast of All Her Fault Peacock

Set against the gleaming backdrop of suburban Chicago, All Her Fault is an addictive new thriller poised to become the most binge-worthy release of the fall. It’s based on the critically acclaimed 2021 novel of the same name by Irish author Andrea Mara, a book celebrated for its suspense, delicate character work, and devastating exploration of maternal guilt under the microscope of public judgment.

Mara’s All Her Fault is far more than a kidnapping mystery. When it landed in 2021, the novel was hailed as one of the sharpest modern examinations of working motherhood—a story that refuses to soften the edges of parental anxiety. Instead, it places ordinary decisions under brutal scrutiny: the playdates arranged between strangers, the help hired out of necessity, the moments of distraction that haunt every parent, and the quiet hostility of a community ready to assign blame before offering compassion.

At the heart of All Her Fault is Marissa Irvine, a self-made wealth manager attempting to balance her career, her marriage, and her 5-year-old son, Milo. Everything shatters when she arrives to collect Milo from his first playdate with a classmate, only to be met by a woman who has never heard of either Marissa or her son. What begins as confusion spirals into every parent’s worst nightmare. As the investigation unfolds, Marissa finds an unlikely ally in Jenny Kaminski, a fellow school mom whose own life becomes entangled in the mystery. Supporting one another becomes an act of defiance against a world determined to find a mother to blame.

Watch All Her Fault on Peacock

Sarah Snook as Marissa Irvine

Fresh from her Emmy-winning turn as Shiv Roy in Succession, Snook inhabits Marissa with raw vulnerability and steel-edged determination. A self-made wealth manager who built her career from scratch, Marissa represents the impossible calculus of contemporary working motherhood: brilliant in the boardroom, devoted to her young son, and constantly navigating the scrutiny that comes with attempting to succeed in both.

What has Sarah Snook been in before? The Australian actor has built a formidable career with projects ranging from Danny Boyle’s Steve Jobs to thriller Predestination, but it was her role as Shiv Roy in Succession that truly made her a household name.

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Dakota Fanning as Jenny Kaminski

Fanning plays Jenny, the head of marketing at Blackhorn who becomes Marissa’s unlikely ally. A fellow mother at the boys’ private school, Jenny initially appears to be everything a modern parent should be: accomplished, attentive, and impeccably organised. But when her nanny Carrie becomes the prime suspect in Milo’s disappearance, Jenny finds herself drowning in public judgment and private guilt. Her friendship with Marissa—forged in the bathroom at a school social over their shared exhaustion—becomes the show’s emotional backbone.

What has Dakota Fanning been in before? Fanning has starred in I Am Sam (which earned her a SAG nomination at the age of 7), Uptown Girls, Once Upon a Time in Hollywood, Ripley, and more.

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Sophia Lillis as Carrie Finch

Lillis plays the enigma at the heart of the mystery with unsettling conviction. Hired as Jenny’s nanny under the assumed name Carrie Finch, she’s actually Josephine Murphy, a young woman whose own devastating loss drives her to an unthinkable act. Her fixation on Milo appears to be obsessive until the finale transforms the story into something more tragic.

What has Sophie Lillis been in before? Since her breakout role in It, Lillis has also starred in Nancy Drew and the Hidden Staircase, It Chapter Two, and the TV series Sharp Objects.

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Abby Elliott as Lia Irvine

Elliott plays Peter’s sister, a recovering drug addict whose past mistakes make her an easy target for suspicion.

What has Abby Elliott been in before? Saturday Night Live alum Elliott is perhaps best known for her Golden Globe-nominated turn as Natalie in The Bear.

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Jake Lacy as Peter Irvine

Lacy plays Peter, Marissa’s husband and a successful commodities trader who initially presents as a supportive partner. But as the series unfolds, his performance reveals something more unsettling: His protective instincts mask a need for dominance. “You are mine,” he tells Marissa in a moment that crystallizes everything lurking beneath the surface of their marriage.

What has Jake Lacy been in before? For fans of The White Lotus, Lacy needs almost no introduction: the actor got his breakout role as Shane Patton, the husband of Alexandra Daddario’s character and arguably one of the least likable characters in the first season of HBO’s hit dark comedy series. He received an Emmy nomination for outstanding supporting actor for the part.

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Michael Peña as Detective Alcaras

Peña plays the detective trying to untangle the truth. A father himself to a non-verbal son with developmental disabilities, Alcaras brings personal stakes to the case—he understands both the terror of missing a child and the subtle signs that separate grief from guilt. His methodical approach gradually uncovers connections that others miss, from hereditary synesthesia to the lies families tell to protect themselves.

What has Michael Peña been in before? Peña has starred in a string of TV series, including Narcos: Mexico, and films like Crash and Ant-Man.

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Source: “AOL Entertainment”