It turns out, that worrying was for nothing. Armitage's deal was announced on February 28, along with casting news about James Tupper and Jeffrey Nordling, who played Madeline's ex-husband Nathan Carlson and Renata's husband Gordon Klein, respectively. The announcement came with some vague hints of what's to come for each character: Carlson will be dealing with "a complicated turn of events in his marriage and with his eldest daughter Abby," Klein will confront "the consequences of a big mistake," and Ziggy will "start second grade" and "continue to be the light of Jane's life." Not the most thrilling plot for young Ziggy, but we'll see!
The rest of the kids, who memorably danced their way through the opening title sequence, don't necessarily have their own sitcoms yet, but they're all pretty busy. Kathryn Newton, who played Madeline's older daughter, had small roles in 2017 Oscar hopefuls like Lady Bird and Three Billboards. 10-year-old Ivy George, who played Renata's daughter Amabella, had a part in the big Twin Peaks revival last year. Presumably, they'll all want to re-join the Big Little Lies world, but, if not, this wouldn't be the first time some kids were recast.