Toni Collette as Annie Graham

Alex Wolff as Peter Graham

Gabriel Byrne as Steve Graham

Milly Shapiro as Charlie Graham

Ann Dowd as Joan

Mallory Bechtel as Bridget

Brock McKinney as Aaron

Jake Brown as Brendan

Morgan Lund as Mr. Davis

Christy Summerhays as Charlie's Teacher

Bus Riley as History Teacher

Jarrod Phillips as Group Leader

Heidi Mendez as Spanish Speaking Woman

Zachary Arthur as Boy in Room

David Stanley as Man at Wake

Moises L. Tovar as Translator

Austin R. Grant as Stoner #1

Gabriel Monroe Eckert as Stoner #2

Harrison Nell as Student #1

BriAnn Rachele as Student #2

Pat Barnett Carr as Ellen Taper Leigh (uncredited)

Ari Aster as Archer Gallery Representative (voice) (uncredited)

Marilyn Miller as Woman in the Tree (uncredited)

Mark Blockovich as Support Group Member (uncredited)

Rachelle Hardy as Cult Member (uncredited)

Jason Miyagi as High School Partier (uncredited)

Lorenzo Silva as Skater Boy (uncredited)

Alexis Long as Cake Girl (uncredited)