cast
-
Joey King
Wren
-
Julia Goldani Telles
Hallie
-
Jaz Sinclair
Chloe
-
Annalise Basso
Katie
-
Alex Fitzalan
Tom
-
Taylor Richardson
Lizzie
-
Javier Botet
Slender Man
- Jessica Blank Hallie's Mom
-
Michael Reilly Burke
Hallie's Dad
-
Kevin Chapman
Mr. Jensen
-
Miguel Nascimento
Kyle
- Eddie Frateschi Biology Teacher
-
Oscar Wahlberg
Boy with Glasses
- Danny Beaton Burley Kid
- Marc Carver Doctor
-
Kris Sidberry
Librarian
- Angela Hope Smith Nurse
- Damon D'Amico Jr. Student
- Timothy Brierley Tour Guide
-
Kayla Caulfield
High School Student (uncredited)
-
Jeffrey Corazzini
Police Officer (uncredited)
-
Michael Tow
Calculus Teacher (uncredited)
- Adrian M. Mompoint Jock (uncredited)
-
Kieran Tuomey
Student (uncredited)
-
Gabrielle Lorthe
Cheerleader (uncredited)
- Yohanna Perez Student (uncredited)