Toni Collette

Annie Graham

Alex Wolff

Peter Graham

Gabriel Byrne

Steve Graham

Milly Shapiro

Charlie Graham

Ann Dowd

Joan

Mallory Bechtel

Bridget

Brock McKinney

Aaron

Jake Brown

Brendan

Morgan Lund

Mr. Davis

Christy Summerhays

Charlie's Teacher

Bus Riley

History Teacher

Jarrod Phillips

Group Leader

Heidi Mendez

Spanish Speaking Woman

Zachary Arthur

Boy in Room

David Stanley

Man at Wake

Moises L. Tovar

Translator

Austin R. Grant

Stoner #1

Gabriel Monroe Eckert

Stoner #2

Harrison Nell

Student #1

BriAnn Rachele

Student #2

Pat Barnett Carr

Ellen Taper Leigh (uncredited)

Ari Aster

Archer Gallery Representative (voice) (uncredited)

Marilyn Miller

Woman in the Tree (uncredited)

Mark Blockovich

Support Group Member (uncredited)

Rachelle Hardy

Cult Member (uncredited)

Jason Miyagi

High School Partier (uncredited)

Lorenzo Silva

Skater Boy (uncredited)

Alexis Long

Cake Girl (uncredited)