Kristen Bell as Mattie

Ian Somerhalder as Dexter

Christina Milian as Isabelle Fuentes

Rick Gonzalez as Stone

Jonathan Tucker as Josh

Samm Levine as Tim

Octavia Spencer as Landlady

Ron Rifkin as Dr. Waterson

Joseph Gatt as Dark Figure

Kel O'Neill as Douglas Zieglar

Zach Grenier as Professor Cardiff

Riki Lindhome as Janelle

John Burke as Newscaster

Mike J. Regan as Phantom

Steve Tom as Male Newscaster #2

Brad Dourif as Thin Bookish Guy

Christine Barger as Goth Girl

Di Quon as Christina

Moira Price as Sarah

Robert Clotworthy as Calvin

Tate Hanyok as Cafe Girl (uncredited)

Julie Lancaster as Female Newscaster (uncredited)

Grant George as U.S. Army Emergency Broadcaster