Laura Dern as Jennifer

Isabelle Nélisse as Jenny (13 Years)

Elizabeth Debicki as Mrs. G

Jason Ritter as Bill

Frances Conroy as Jane Graham

John Heard as William P. Allens

Jodi Long as Rebecca

Laura Allen as Young Nettie

Matthew Rauch as Aaron

Common as Martin

Ellen Burstyn as Nettie

Jessica Sarah Flaum as Jenny (15 Years)

Juli Erickson as Grandmother

Dana Healey as Dr. G.

Aaron Williamson as Raymond (Ray)

Shay Lee Abeson as Young Becky

Isabella Amara as Young Franny

Daniel Berson as Joe

Chelsea Alden as Samantha

Ricki Bhullar as Student #1

Jenson Cheng as Student #2

Madara Jayasena as Student #3

Emily Sandifer as Student #4

Tina Parker as Franny

Scott Takeda as Master of Ceremonies

Noah Lomax as Lucas Mendelson

Grant James as Anthony Graham

Madison David as Younger Iris

Tarek Bishara as Detective Amato

Gretchen Koerner as Iris

Jaqueline Fleming as Margie

Aaron Mitchell as Acolyte (uncredited)