Kiana Madeira
as Sarah Fier / Deena
Ashley Zukerman
as Solomon Goode / Nick Goode
Gillian Jacobs
as Adult Zigg / C. Berman
Olivia Scott Welch
as Hannah Miller / Samantha Fraser
Benjamin Flores Jr.
as Henry / Josh
Darrell Britt-Gibson
as Martin
Sadie Sink
as Constance / Ziggy Berman
Emily Rudd
as Abigal / Cindy Berman
McCabe Slye
as Mad Thomas / Tommy Slater
Julia Rehwald
as Lizzie / Kate
Fred Hechinger
as Isaac / Simon
Jordana Spiro
as The Widow / Mrs. Lane
Jordyn DiNatale
as Ruby Lane