Abby Elliott plays Lia Irvine in the new Peacock mystery series All Her Fault. The actor, known for her comedic work on Saturday Night Live and The Bear, takes on a dramatic role as a recovering addict caught in her family’s secrets.
The 2025 limited series All Her Fault features a large ensemble cast, and among them is Abby Elliott, who appears in a key supporting role. Her character brings additional layers of tension and complexity to the story of a missing child. For viewers recognizing the actor but unsure from where, her career spans notable television shows and films.
Abby Elliott’s Role in All Her Fault
In All Her Fault, Abby Elliott plays Lia Irvine, the sister of Peter Irvine (Jake Lacy). Lia is a recovering drug addict, a part of her past that makes her an easy target for suspicion within the tense narrative. Her character is deeply involved in the family’s dynamic and hidden history.
The series follows the story of Marissa Irvine (Sarah Snook), whose young son, Milo, disappears during a playdate. As the investigation unfolds, Lia finds herself entangled in the mystery. Her relationships with her brothers, Peter and Brian, are strained by past events and long-kept secrets that gradually come to light.
From Comedy Stages to Saturday Night Live
Abby Elliott built the foundation of her career in comedy. She studied and performed at famous improv and sketch comedy institutions, including The Groundlings Theatre and School and the Upright Citizens Brigade Theatre in Los Angeles.
Her big break arrived in 2008 when she joined the cast of Saturday Night Live (SNL). She was a featured player on the show for four seasons, from 2008 to 2012. During her time on SNL, she became well-known for her impressions of celebrities like Zooey Deschanel, Meryl Streep, and Anna Faris. Elliott made history as the first cast member to follow in a parent’s footsteps; her father, comedian Chris Elliott, was also an SNL cast member.
Television Success and Voice Acting Work
After leaving Saturday Night Live, Abby Elliott continued to find success in television comedy series. In 2015, she starred as Brooke Von Weber in the Bravo sitcom Odd Mom Out. She later landed a lead role in the 2020 NBC sitcom Indebted as Rebecca Klein.
Throughout her career, she has made numerous guest appearances on popular TV shows. These include roles on How I Met Your Mother, Happy Endings, Inside Amy Schumer, and 2 Broke Girls. Elliott has also done voice acting work, lending her voice to animated series such as Star vs. The Forces of Evil and Home: Adventures with Tip & Oh.
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Golden Globe Nomination and The Bear Breakthrough
A significant career milestone came in 2022 when Abby Elliott was cast in the FX and Hulu drama The Bear. She plays Natalie “Sugar” Berzatto, the sister of Jeremy Allen White’s character, Carmy. Her performance in the critically acclaimed show earned her and the cast a Screen Actors Guild Award. She also received a Golden Globe nomination for her work on the series.
Her role in The Bear marked a shift towards more dramatic material and brought her wider recognition. This success opened new opportunities and was instrumental in her being cast in the dramatic role of Lia Irvine in All Her Fault.
Where to Watch All Her Fault
All Her Fault is available to stream exclusively on Peacock. All eight episodes of the mystery thriller miniseries were released on November 6, 2025.
The series is an adaptation of the 2021 bestselling novel of the same name by author Andrea Mara. It was created for television by Megan Gallagher and directed by Kate Dennis and Minkie Spiro.
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