Reese Witherspoon

Dr. Elizabeth Masterson

Mark Ruffalo

David Abbott

Donal Logue

Jack Houriskey

Dina Spybey-Waters

Abby Brody

Ben Shenkman

Dr. Brett Rushton

Jon Heder

Darryl

Ivana Miličević

Katrina

Caroline Aaron

Grace

Rosalind Chao

Fran

Ron Canada

Dr. Walsh

Willie Garson

Maitre D'

Kerris Dorsey

Zoe

Alyssa Shafer

Lily

Gabrielle Made

Nurse Maria

William Caploe

Nurse Bill

Shulie Cowen

Nurse Jenny

Billy Beck

Mr. Clarke

Diego Sebastian

Bandage Guy

Cristian Cruz

Orderly Luis

Benjamin Hughes

Peroxide Rocker

Cara Vivien Rosenberg

Balloon Girl

Catherine Taber

Intern Karen

Chris Pflueger

Abby's Husband

Paul Cassell

Brett's Friend

Drew Letchworth

UFO Guy

Raymond O'Connor

Catholic Priest

Lucille Soong

Chinese Exorcist

Joel McKinnon Miller

Lead Ghostbuster

Victor Yerrid

Ghostbuster

Bobby Benjamin

Ghostbuster

Ron Hacker

Blues Guy

Kara Hamilton

Valerie

Lorna Scott

Hippie Neighbour

Jeffrey Marcus

Uptight Neighbour

Ken Takemoto

Chinese Neighbour

Chaim Jeraffi

Dry Cleaner

Doug Krizner

Donald

Zoe Waters

Park Girl

Jacob Chambers

Kenny

Karen Harrison

Kenny's Friend

Ingrid Coree

Waitress

Lee Burns

Ivan the Bartender

Amita Balla

Receptionist

Nicole Wilder

Kim

Tim Connolly

Security Guard

Tim Sitarz

Security Guard

Ken Clark

Security Guard

Tony Brubaker

Security Guard

Jimmy Ortega

Security Guard

Yeena Fisher

Seamstress (uncredited)

David Niles

Man on Bicycle (uncredited)