All Her Fault Cast: Season 1 Actors and Characters List

Peacock’s “All Her Fault” landed in November 2025 with a cast that reads like a who’s-who of prestige TV. Sarah Snook traded Succession’s boardrooms for a Chicago mansion where her character’s son vanishes during a playdate — the kind of hook that keeps viewers glued through episode credits. If you’ve been hunting for a breakdown of who’s playing whom, what roles they carry, and whether the show has legs beyond season one, you’re in the right place.

Lead Actress: Sarah Snook as Marissa Irvine · Detective Role: Michael Peña as Detective Alcaras · Jenny Kaminski: Dakota Fanning · Peter Irvine: Jake Lacy · Milo Irvine: Duke McCloud

The table below summarizes key metadata about the series, drawn from TV Guide and Rotten Tomatoes.

The 63 Metascore reflects mixed-to-positive critical reception — solid but not spectacular, typical for thriller premises that live or die on execution.

All Her Fault Season 1 Cast

The main cast pulls together actors from some of the most talked-about projects in recent years. At the center sits Sarah Snook, fresh off her Emmy-winning turn in “Succession,” playing Marissa Irvine — a self-made wealth manager whose comfortable life unravels when her 5-year-old son Milo disappears during a playdate. The Rotten Tomatoes synopsis frames it as “every parent’s worst nightmare,” and Snook brings exactly the controlled intensity that role demands.

Her on-screen husband Peter Irvine is played by Jake Lacy, best known for “The Office” and more recently “The Morning Show.” Peter is described as a commodities trader, which sets up the financial angle running beneath the kidnapping plot. Dakota Fanning shows up as Jenny Kaminski, described as a fellow mom and head of marketing at Blackhorn — she’s positioned as Marissa’s friend, though the thriller format guarantees that friendship gets tested.

Jay Ellis, who played Lt. Reuben “Payback” Fitch in “Top Gun: Maverick,” takes the role of Colin Dobbs, Marissa’s best friend and business partner. Abby Elliott portrays Lia Irvine, Peter’s recovering drug addict sister — a character who adds another layer of instability to the family dynamics.

Sarah Snook as Marissa Irvine

Snook’s Marissa Irvine is the engine driving everything. A self-made wealth manager, she’s got the kind of competence that makes her husband’s financial world run. When Milo vanishes, that same competence becomes both her weapon and her blind spot — she’s used to controlling outcomes, but a missing child doesn’t negotiate.

Snook also serves as executive producer on the project, giving her creative input beyond performance. Her casting was announced as part of the initial production news, and the role represents a deliberate pivot from the Siobhan/Chisholm character that made her famous.

Michael Peña as Detective Alcaras

Michael Peña brings his signature blend of everyman warmth and sharp timing to Detective Alcaras, the lead investigator on Milo’s disappearance. Note that some sources — including Rotten Tomatoes — list the character as Detective McConville instead, suggesting a name change during production or a simple documentation discrepancy between outlets.

Johnny Carr co-stars as Detective Greco, Alcaras’ partner, giving the investigation a two-detective dynamic that lets the show play with good cop/partner dynamics.

Dakota Fanning as Jenny Kaminski

Fanning’s Jenny Kaminski operates in the same social orbit as Marissa — both are mothers with kids in the same circle, both have careers that suggest financial comfort. The TV Guide synopsis opens with Marissa arriving to pick up Milo from a playdate, which positions Jenny’s family at the center of whatever triggered the kidnapping.

Reviews have praised the Fanning-Snook pairing, with critics noting the tension between their characters as a highlight. Thomas Cocquerel plays Richie Kaminski, Jenny’s husband and a high school teacher, which positions him at a remove from the financial world driving Marissa and Peter.

Jake Lacy as Peter Irvine

Lacy’s Peter Irvine occupies an interesting space — a commodities trader married to a wealth manager, which means money is both his profession and his marriage’s foundation. When that foundation cracks, the financial stakes get layered onto the personal ones.

The pattern across the core cast is clear: each actor brings serious dramatic credentials from recent hit projects, and the thriller format gives them material that plays to intensity over comedy. Lacy especially trades his comic timing for something colder, which works for the paranoid energy of a husband who might be hiding things.

All Her Fault Cast Season 2

Here’s the situation with season two: the show was announced as a limited miniseries, and TV Guide lists exactly one season. That doesn’t mean Peacock couldn’t greenlight more episodes, but there’s no announced casting for additional seasons at this point.

Related searches consistently show interest in “All Her Fault cast season 2,” but no announcements have been made about which actors might return or who could join. The Golden Globe nominations cover the series as it exists now — Best Limited Series and Best Actress for Snook — which suggests the industry is treating this as a complete work rather than an ongoing property.

For viewers hoping for more: keep an eye on whether the Golden Globe wins change Peacock’s calculus. Limited series often get second seasons when awards attention translates to subscriber growth.

Announced cast members

Nothing officially confirmed beyond the season one roster. The production team — including executive producers Andrea Mara (the novel’s author), Megan Gallagher (writer), and Minkie Spiro (director) — haven’t signaled plans for continuation.

Returning actors

If season two happens, it’s reasonable to expect Snook, Lacy, Fanning, and Peña at the center. Sophia Lillis’ Carrie Finch character has “season one mystery” written all over it, which means her return depends heavily on whether the story leaves her arc open-ended.

Sarah Snook in All Her Fault Cast

Snook’s pivot from Succession to All Her Fault feels deliberate. Siobhan Chisholm was all calculation and ambition in a corporate setting; Marissa Irvine has the competence but operates in a domestic crisis that’s far more visceral. The physical and emotional stakes are different — a missing child triggers panic rather than political maneuvering.

She also holds an executive producer credit, which gives her influence over the project beyond performance. That dual role — lead actress plus producer — suggests she was invested in this as a creative opportunity, not just a paycheck.

Role as Marissa Irvine

Marissa is described as a self-made wealth manager whose son Milo disappears. The “self-made” part is important: she’s achieved success on her own terms, which makes the loss of control when Milo vanishes feel like a specific kind of humiliation layered on terror.

Duke McCloud plays the 5-year-old Milo, marking a notable screen debut. McCloud previously appeared in the 2025 Amy Schumer comedy “Kinda Pregnant” before taking on the role that anchors the show’s emotional core.

Production credits

Snook’s executive producer credit places her among the creative decision-makers. The production team also includes Minkie Spiro as director and executive producer (she directed Episode 1, released November 6, 2025), Kate Dennis as director, Megan Gallagher as executive producer and writer, and Andrea Mara as executive producer.

Wikipedia notes that the series received “generally positive reviews” with specific praise for Snook and Fanning. The 63 Metascore from TV Guide reflects mixed-to-positive critical reception — solid but not spectacular, which is typical for thriller premises that live or die on execution.

Supporting Cast in All Her Fault

Beyond the marquee names, the supporting cast fills out a world that feels densely inhabited. Sophia Lillis plays the character at the center of the mystery: Josephine “Josie” Murphy and Carrie Finch, described as the nanny who allegedly kidnapped Milo. Primetimer notes that Carrie Finch is presented as mysterious, which tracks with her position as the show’s primary suspect.

Kartiah Vergara plays Ana Garcia, Marissa and Peter’s nanny — which positions two nannies in the household and raises immediate questions about who was responsible for Milo at the time of the disappearance. Johnny Carr plays Detective Greco as Alcaras’ partner, and Daniel Monks appears as Brian Irvine.

All Her Fault cast Sam

The “Sam” role doesn’t appear in verified sources. Top search results for “All Her Fault cast Sam” likely reflect misremembered character names or fan speculation rather than actual cast data. The confirmed cast list from Wikipedia and Rotten Tomatoes doesn’t include a character named Sam.

All Her Fault cast Esther

No character named Esther appears in verified sources. Similar to “Sam,” searches for this name may represent confusion with other characters or speculative results not backed by production data.

All her fault cast old lady

The “old lady” reference likely points to Lia Irvine (Peter’s sister, played by Abby Elliott) or potentially another older female character in the extended family. Without verified confirmation of a specific “old lady” character, this appears to be informal fan shorthand for a supporting role.

The two-nanny configuration isn’t just a plot device — it suggests the writers deliberately layered the mystery so that anyone with access to Milo could be implicated.

Is All Her Fault Based on a True Story?

All Her Fault is a fictional adaptation, not a true story. The series is based on the 2021 novel of the same name by Andrea Mara, an Irish author who also serves as executive producer. The book is a standalone thriller, not a true crime retelling.

That said, the premise taps into real anxieties. A child disappearing during a playdate, a community of affluent parents, questions about who knew what — these elements mirror the texture of real missing child cases without claiming to recount specific events.

Connection to Emanuela Orlandi

One of the top questions driving search traffic is “Has Emanuela Orlandi ever been found?” — a reference to a famous 1983 disappearance in Vatican City that has never been solved. The connection to All Her Fault appears to be speculative rather than substantive: both involve missing persons cases, but Mara’s novel doesn’t appear to reference the Orlandi case directly.

Wikipedia notes that the series is set in Chicago, which rules out geographic connections to real-world missing persons cases in Rome or elsewhere. Viewers searching for this angle likely encountered the question through algorithmic associations rather than actual plot connections.

Real cases referenced

No specific real cases are referenced in verified sources about All Her Fault. The thriller draws on genre conventions — the affluent family, the missing child, the suspicious friend — rather than documented true crime. Andrea Mara’s novel appears to be pure fiction, using real anxieties rather than real cases as its foundation.

“every parent’s worst nightmare”

— Rotten Tomatoes synopsis, official synopsis

“Marissa Irvine arrives to pick up her son Milo from a playdate… and so begins every parent’s worst nightmare”

— TV Guide, synopsis

Related reading: Cast of Anyone But You · Man on the Inside Cast

Sarah Snook stars as Marissa Irvine alongside Michael Peña and Dakota Fanning, with full supporting cast guide detailing every key role in the Peacock thriller.

Frequently asked questions

For viewers deciding whether to stream: the cast quality is genuinely high. Snook and Fanning deliver performances worth watching, and the thriller pacing keeps momentum through the episodes. The limited series format means you’re getting a complete story rather than a setup for an unfinished arc.

Snook and Fanning make a compelling case for the show’s endurance beyond initial release — their pairing suggests Peacock will have audience retention data worth examining after the Golden Globe results come in.