Iain Armitage as Ziggy Chapman, Jane's son[11] Sarah Baker as Thea Cunningham Sarah Burns as Gabrielle P. J. Byrne as Principal Nippal Santiago Cabrera as Joseph Darby Camp as Chloe Mackenzie, Madeline's younger daughter Hong Chau as Jackie Kelen Coleman as Harper Stimson Merrin Dungey as Detective Adrienne Quinlan[12] Ivy George as Amabella Klein, Renata's daughter Virginia Kull as Ms. Barnes Chloe Coleman as Skye Carlson, Bonnie's daughter Kathryn Newton as Abigail Carlson, Madeline's elder daughter[8] Molly Hagan as Dr. Moriarty Larry Sullivan as Oren[12] David Monahan as Bernard[12] Kathreen Khavari as Samantha[13] Joseph Cross as Tom, Madeline and Celeste's favourite cafe owner Robin Weigert as Dr. Amanda Reisman, Perry and Celeste's therapist Larry Bates as Stu