Christine Baranski as Agnes van Rhijn
Carrie Coon as Bertha Russell
Louisa Jacobson Gummer as Marian Brook
Denée Benton as Peggy Scott
Cynthia Nixon as Ada Brook
Morgan Spector as George Russell
Taissa Farmiga as Gladys Russell
Harry Richardson as Larry Russell
Blake Ritson as Oscar Van Rhijn
Thomas Cocquerel as Tom Raikes
Simon Jones as Bannister
Jack Gilpin as Church
Debra Monk as Armstrong
Kristine Nielsen as Mrs. Bauer
Taylor Richardson as Bridget
Ben Ahlers as Jack Trotter
Michael Cerveris as Watson
Celia Keenan-Bolger as Mrs. Bruce
Douglas Sills as Monsieur Baudin
Kelley Curran as Turner
Claybourne Elder as John Adams