Laura Dern

Character: Jennifer

Isabelle Nélisse

Character: Jenny (13 Years)

Elizabeth Debicki

Character: Mrs. G

Jason Ritter

Character: Bill

Frances Conroy

Character: Jane Graham

John Heard

Character: William P. Allens

Jodi Long

Character: Rebecca

Laura Allen

Character: Young Nettie

Matthew Rauch

Character: Aaron

Common

Character: Martin

Ellen Burstyn

Character: Nettie

Jessica Sarah Flaum

Character: Jenny (15 Years)

Juli Erickson

Character: Grandmother

Dana Healey

Character: Dr. G.

Aaron Williamson

Character: Raymond (Ray)

Shay Lee Abeson

Character: Young Becky

Isabella Amara

Character: Young Franny

Daniel Berson

Character: Joe

Chelsea Alden

Character: Samantha

Ricki Bhullar

Character: Student #1

Jenson Cheng

Character: Student #2

Madara Jayasena

Character: Student #3

Emily Sandifer

Character: Student #4

Tina Parker

Character: Franny

Scott Takeda

Character: Master of Ceremonies

Noah Lomax

Character: Lucas Mendelson

Grant James

Character: Anthony Graham

Madison David

Character: Younger Iris

Tarek Bishara

Character: Detective Amato

Gretchen Koerner

Character: Iris

Jaqueline Fleming

Character: Margie

Aaron Mitchell

Character: Acolyte (uncredited)

Mark Winn

Character: East Indian protester (uncredited)