The series hails from Julie Plec, Carina Adly MacKenzie, Universal Television andAmazonMGM Studios.
It centers on the wealthy, seemingly perfect Sinclair family, who spend every summer on their private island.
Gummer, FitzGerald and King play the three Sinclair sisters.

Emily Alyn Lind, Shubham Maheshwari , Esther McGregor and Joseph ZadaGetty/Ayilya Thampuran/Getty/Hugh Stewart
Watch on Deadline
Maheshwari is Gat.
Wickedly funny and keenly observant, Mirren is a study in contradiction.
Shes an artist who is too worried about being perfect to color outside the lines.

She craves new experiences, but clings to childhood like a safety blanket.
Charismatic, dirty-minded, and occasionally reckless, Johnny is the ringleader of his friends more mischievous adventures.
This summer, hes about to collide with accountability for the very first time.
Suffice it to say hes not a fan.
Cast also includes series regular Arsher Ali and Wendy Crewson, who recurs.
Executive producers also include Emily Cummins for My So-Called Company and the novels author, Lockhart.
Universal Television, a division of Universal Studio Group, and Amazon MGM Studios are the studios.
Nzingha Stewart will be directing the first episode.
Lind is repped by CAA and Brecheen Feldman Breimer.
Maheshwari is repped by Untitled Entertainment and Gang, Tyre Law.
McGregor is repped by 3 Arts Entertainment and Sloane, Offer, Weber & Dern.
Zada is repped by Untitled Entertainment, RGM Artists and GGSSC Law.