Abby Elliott was able to skip one chunk of research for Peacock’s adaptation of All Her Fault, the missing-child thriller by Andrea Mara. “At the beginning of the whole process, [I was told] to just not read the book until after — you don’t want that in your head,” she tells Us.
Over eight episodes set in Chicago, the series (streaming now) follows Marissa Irvine’s (Sarah Snook) ordeal after 5-year-old son Milo (Duke McCloud) is taken. At some point or another, everyone in her support system is also a suspect — including husband Peter (Jake Lacy) and his siblings, Lia (Elliott) and Brian (Daniel Monks). This Lia, however, has changed from the novel: Originally, “she came in much, much later, and she’s a very different vibe,” Elliott, 38, says. Lia…
