The All Her Fault cast headlines one of Peacock’s most anticipated releases of 2025 — a psychological thriller based on Andrea Mara’s bestselling novel. Premiering on November 6, 2025, the series stars Sarah Snook in a powerhouse lead performance alongside Dakota Fanning, Jake Lacy, Michael Peña, Abby Elliott, and Sophia Lillis.
The series follows Marissa Irvine, a mother whose world shatters after her son vanishes during what should have been a simple school pickup. What begins as a desperate search quickly spirals into a maze of deception, guilt, and family secrets. With an exceptional cast and gripping storytelling, All Her Fault has become one of Peacock’s most talked-about new thrillers.
Sarah Snook Leads the All Her Fault Cast as Marissa Irvine
The center of the story is Sarah Snook as Marissa Irvine, a devoted mother whose life collapses when her young son, Milo, disappears. Snook, best known for her Emmy-winning role as Shiv Roy in Succession, delivers a performance filled with intensity and vulnerability.
Marissa is not a perfect hero — she’s flawed, emotional, and deeply human. As she navigates fear, paranoia, and public scrutiny, Snook brings both subtlety and strength to the role. Her portrayal of a mother torn between guilt and determination anchors the emotional core of All Her Fault.
Jake Lacy as Peter Irvine — The Husband Hiding More Than He Admits
Jake Lacy plays Peter Irvine, Marissa’s husband, whose seemingly calm demeanor hides a growing web of secrets. Lacy, known for The White Lotus and A Friend of the Family, gives Peter a quiet tension that builds through the series.
As the police investigation deepens, Peter’s choices and evasions spark suspicion — not only from the authorities but from Marissa herself. His relationship with his wife shifts from solidarity to unease, creating some of the show’s most gripping domestic confrontations.
Dakota Fanning as Jenny Kaminski — The Friend Who Knows Too Much
Dakota Fanning joins the All Her Fault cast as Jenny Kaminski, Marissa’s best friend and confidante. At first, Jenny appears as the emotional support Marissa needs — the kind, dependable neighbor always there to help. But as the truth unravels, Jenny’s story begins to fracture, revealing unsettling connections to the missing child case.
Fanning plays Jenny with a delicate balance of empathy and ambiguity. Her chemistry with Sarah Snook creates a charged dynamic where every glance and conversation carries double meaning. As the mystery deepens, Jenny becomes both ally and enigma — forcing viewers to question her true role in Marissa’s nightmare.
Michael Peña as Detective Alcaras — The Voice of Reason Amid Chaos
Michael Peña takes on the role of Detective Alcaras, the lead investigator tasked with finding Marissa’s missing son. Peña brings depth and restraint to a character who could have easily fallen into cliché. His Detective Alcaras is patient yet relentless — a man haunted by the weight of his job and his empathy for the family.
His interactions with the Irvines provide the series with its investigative backbone, grounding the suspense in realism. Peña’s performance is both authoritative and compassionate, making Alcaras one of the most relatable characters in the ensemble.
Abby Elliott as Lia Irvine — The Protective Sister with Divided Loyalties
Abby Elliott appears as Lia Irvine, Peter’s sister, who becomes caught between protecting her brother and confronting the truth. Elliott gives Lia an intriguing mix of warmth and suspicion. She’s caring but cautious, and as secrets start to spill, her loyalty to her family is pushed to the breaking point.
Lia’s role grows significantly throughout the series, offering a fresh perspective on the Irvine family dynamic. She serves as both a confidante and a mirror to Marissa’s emotional unraveling.
Sophia Lillis as Carrie Finch — The Key to the Past
Rising star Sophia Lillis portrays Carrie Finch, a young woman with a mysterious connection to the Irvine family. Her character’s entrance midway through the series reshapes the narrative, introducing new clues about the disappearance and the hidden history linking several main characters.
Lillis’s subtle performance adds a haunting layer to the mystery. Her scenes with both Snook and Peña bring new dimensions to the show’s central conflict.
Duke McCloud as Milo Irvine — The Heart of the Story
Child actor Duke McCloud plays Milo Irvine, whose disappearance launches the story into motion. Although Milo is physically absent for much of the series, his presence is felt in every scene. Through flashbacks and family memories, McCloud’s performance helps humanize the show’s mystery — reminding viewers of what’s truly at stake.
The Ensemble Behind the Tension
The strength of the All Her Fault cast lies in its balance — experienced stars matched with fresh talent. Each performer brings a distinct emotional rhythm that keeps the audience hooked from start to finish.
- Sarah Snook’s emotional power makes Marissa both vulnerable and determined.
- Dakota Fanning’s quiet complexity blurs the line between friend and foe.
- Jake Lacy’s understated menace fuels tension in every domestic scene.
- Michael Peña’s calm precision offers relief amid the chaos.
- Sophia Lillis’s mysterious energy pushes the narrative into darker territory.
Together, their chemistry turns All Her Fault into a character-driven mystery rather than a formulaic whodunit.
Production and Filming
All Her Fault was filmed in Melbourne, Australia, which doubles for an American suburban setting. The choice of location gives the show a universal look — familiar yet eerie, with neighborhoods that feel both safe and unsettling.
The series spans eight episodes, each approximately 50 minutes long. The cinematography uses natural light, muted tones, and close-up framing to mirror Marissa’s growing paranoia and sense of isolation.
Executive producer and showrunner Megan Gallagher emphasized that casting was key to the show’s authenticity. Each actor was chosen not just for name recognition but for their ability to bring subtle emotional truth to their characters.
Themes Explored by the All Her Fault Cast
At its heart, All Her Fault explores how easily ordinary lives can unravel. The cast brings these themes to life with nuance and intensity, making the story both thrilling and deeply emotional.
- Trust and betrayal: The show asks who can truly be trusted — even among friends and family.
- Motherhood and guilt: Marissa’s journey captures the universal fear of losing control over the safety of one’s child.
- The illusion of suburbia: Behind every manicured lawn lies something darker, a reality the cast portrays convincingly.
- Power and vulnerability: The performances highlight how quickly power dynamics shift when secrets are exposed.
These emotional layers, delivered by an exceptional cast, elevate All Her Fault beyond standard mystery fare.
What Critics Are Saying About the Performances
Early reactions to All Her Fault praise the cast’s emotional realism and tension-building chemistry. Sarah Snook’s portrayal has been singled out as her most affecting performance since Succession. Critics highlight how her interactions with Dakota Fanning — part friendship, part psychological duel — form the heartbeat of the series.
Jake Lacy’s restrained performance also earned attention for its unpredictability. Viewers are left guessing about his guilt or innocence until the very end, while Michael Peña’s grounded performance adds humanity to the procedural elements.
Streaming and Viewing Details
For U.S. audiences, All Her Fault is streaming exclusively on Peacock.
- Platform: Peacock (NBCUniversal)
- Release Date: November 6, 2025
- Episodes: 8 total
- Genre: Psychological thriller / Mystery drama
- Rating: TV-MA
The entire series is available to stream at once, allowing for a full binge-watch experience. With tight pacing and layered performances, most viewers find it nearly impossible to stop after just one episode.
Why the All Her Fault Cast Stands Out
The success of All Her Fault rests heavily on its ensemble. Unlike many thrillers that rely solely on plot twists, this series is character-driven — and that’s entirely due to the cast’s ability to humanize fear, guilt, and deception.
Sarah Snook leads with authority, but each supporting actor complements her performance rather than fading into the background. Dakota Fanning’s unpredictability, Michael Peña’s measured composure, and Jake Lacy’s deceptive calm create a tension that lingers long after each episode ends.
This isn’t just another missing-person story — it’s a deeply emotional exploration of trust and identity, made unforgettable by one of the year’s most compelling casts.
Final Thoughts
The All Her Fault cast has delivered a rare combination of suspense, emotion, and authenticity that sets Peacock’s newest thriller apart from the rest. With Sarah Snook’s commanding lead, Dakota Fanning’s layered performance, and a supporting ensemble that brings depth to every scene, All Her Fault is poised to become a defining psychological drama of 2025.
Watch the All Her Fault cast now on Peacock — and share your thoughts below about which performance left you most captivated.