Mark Wahlberg as Elliot Moore

Zooey Deschanel as Alma Moore

John Leguizamo as Julian

Ashlyn Sanchez as Jess

Betty Buckley as Mrs. Jones

Spencer Breslin as Josh

Robert Bailey Jr. as Jared

Frank Collison as Nursery Owner

Jeremy Strong as Private Auster

Alan Ruck as Principal

Victoria Clark as Nursery Owner's Wife

M. Night Shyamalan as Joey (voice)

Alison Folland as Woman Reading on Bench with Hair Pin

Kristen Connolly as Woman Reading on Bench

Cornell Womack as Construction Foreman

Curtis McClarin as Construction Crew Member

Robert Lenzi as Jake

Derege Harding as Train Conductor

Roberto Lombardi as Father in Elliot's Group

Kerry O'Malley as Woman on Cell Phone

Shayna Levine as Teenage Girl in Jeep

Stéphane Debac as French Bicyclist

Cyrille Thouvenin as French Bicyclist's Friend

Babita Hariani as Medical Correspondent

Edward James Hyland as Professor Kendall Wallace

Armand Schultz as Talk Show Host

Stephen Singer as Dr. Ross

Sophia Burke as Student Named Laura

Alex Van Kooy as Boy In Class

Charlie Saxton as Student Named Dylan

Kathy Hart as Vice Principal

Lisa Furst as Teacher in Auditorium

Rick Foster as Railway Police Officer

Marc H. Glick as P.A. System Conductor

Don Castro as Philadelphia Police Officer

Bill Chemerka as Taxi Driver - Sal

Jann Ellis as Older Woman with Dog

Whitney Sugarman as Passenger

Mary Ellen Driscoll as Woman Passenger

Greg Wood as Passenger at Counter

Peter Appel as Diner Owner

Eoin O'Shea as Passenger #1

Michael Quinlan as Passenger #2

Lyman Chen as Passenger #3

Brian O'Halloran as Jeep Driver

Megan Grace as Jeep Passenger #1

Rich Chew as Jeep Passenger #2

Keith Bullard as Man In Crowd At Crossroads

Joel de la Fuente as Realtor

Ashley Brimfield as Woman In Group

Mara Hobel as Woman with Hands Over Ears

James Breen as Farmhouse Voice (voice)

Carmen Bitonti as Mangled Construction Worker

Brian Anthony Wilson as Arguing Man in Crowd

Greg SmithAldridge as Zoo Employee

Ukee Washington as Local News Anchor

John Ottavino as Network News Anchor

Sid Doherty as Radio News Announcer

Wes Heywood as Radio Voice (voice)

Nancy Sokerka as Radio Caller Fay (voice)

Julia Yorks as Young Woman Voice on Phone (voice)

Bill Shusta as Radio Newsman (voice)

Kirk Penberthy as Radio Announcer (voice)

Alex Craft as Truck Passenger Boy

Allie Habberstad as Truck Passenger Girl

Alex Harz as Pico - Helen's Pianist (uncredited)

Adam Schoon as Mr. Jones (uncredited)

Lee Squire as Student (uncredited)

Robert Bizik as Train Passenger (uncredited)

Alicia Warrington as U.S. Reporter