Kate Winslet

as Sarah Pierce

Patrick Wilson

as Brad Adamson

Jennifer Connelly

as Kathy Adamson

Gregg Edelman

as Richard Pierce

Sadie Goldstein

as Lucy Pierce

Ty Simpkins

as Aaron Adamson

Noah Emmerich

as Larry Hedges

Jackie Earle Haley

as Ronnie J. McGorvey

Phyllis Somerville

as May McGorvey

Helen Carey

as Jean

Catherine Wolf

as Marjorie

Mary B. McCann

as Mary Ann

Trini Alvarado

as Theresa

Marsha Dietlein

as Cheryl

Jane Adams

as Sheila

Raymond J. Barry

as Bullhorn Bob

Sarah Buxton

as Slutty Kay

Thomas Greaney

as Troy

Anna Audia

as Isabella

Celestial Hakim

as Courtney

Hunter Reid

as Christian

Chadwick Brown

as Tony Correnti

Phil McGlaston

as Dewayne Rogers

Bruce Kirkpatrick

as Bart Williams

Adam Mucci

as Richie Murphy

Chance Kelly

as Pete Olaffson

Rebecca Schull

as Laurel

Crystal Field

as Josephine

Lola Pashalinski

as Bridget

Walker Ryan

as "G"

David Cole

as Skateboarder 2

Weston Elrod

as Skateboarder 3

Erica Fae

as Richard's Secretary

Leo Trombetta

as Frank

Christopher Nicholas Smith

as Steak House Waiter

Adam Sietz

as Large Man

Tom Perrotta

as Small Man

Stan Carp

as Cabbie

Sandra Berrios

as Kind Woman in Hospital

Ivar Brogger

as ICU Counselor

Myra Turley

as ICU Nurse

David Rowden

as Tow Yard Attendant

Paul Mott

as Boy in Kathy's Documentary

Margaret Pace

as EMT

Beatrice Rigaud

as Concerned Mom at Pool #1

Mary Goggin

as Concerned Mom at Pool #2

Jillian Lindig

as Concerned Mom at Pool #3

William Harvey

as 1st Policeman at Pool

Casper Andreas

as 2nd Policeman at Pool

Matt Garifo

as Lifeguard

Brooke Fazio

as Snack Girl

Monica Dobson

as Wading Pool Mom

Ken Tirado

as Bartender

Carlie LaPorta

as Child at Steakhouse

Cody Rubenstein

as Child at Steakhouse

Joe Guest

as Ted from Richard's Office

Bruce Lee Gross

as Ray from Next Door

Patrick Larkin

as Auditor Team Captain

Michael Diesel

as Police Officer at McGorvey's

Jennifer Rainville

as Reporter - "Channel 5 News" Segment

Gary Anthony Ramsay

as Off-Screen Anchor - "Channel 5 News" Segment (voice)

Patricia A. Gangemi

as Concerned Parent #1 - "Channel 5 News" Segment

Cynthia L. Wiese

as Concerned Parent #2 - "Channel 5 News" Segment

Loren Wiese

as Concerned Parent #3 - "Channel 5 News" Segment

Clare F. Mitchell

as Concerned Parent #4 - "Channel 5 News" Segment

Leon Vitali

as Oddly Familiar Man

Conrad Angel Corral

as Slutty Kay Fan Club Member

Darrell Geer

as Slutty Kay Fan Club Member

Gil Ira Hayes

as Slutty Kay Fan Club Member

Mark A. Pierce

as Slutty Kay Fan Club Member

Marshall Lefcourt

as Slutty Kay Fan Club Member

John Begley

as Background Football Player

Mike Ganim

as Background Football Player

Travis Koestler

as Skateboarder

Daniel Falla

as Skateboarder

Luis Tolentino

as Skateboarder

Tugman Tookmanlian

as Skateboarder

Will Lyman

as Narrator (voice)

Steve Antonucci

as Swimmer (uncredited)

Deanna Dys

as Vanity Fair Pool Girl (uncredited)

Ashley Fung

as Girl at the Pool (uncredited)

Marianne Hettinger

as Sunbathing Model (uncredited)

Callie Thompson

as Little Girl at Pool (uncredited)