Hilary Swank
Claire Morgan
Robert De Niro
Stan Harris
Michelle Pfeiffer
Ingrid Withers
Josh Duhamel
Sam
Sarah Jessica Parker
Kim Doyle
Zac Efron
Paul
Lea Michele
Elise
Ashton Kutcher
Randy
Halle Berry
Nurse Aimee
Jon Bon Jovi
Daniel Jensen
Katherine Heigl
Laura Carrington
Seth Meyers
Griffin Byrne
Jessica Biel
Tess Byrne
Til Schweiger
James Schwab
Carla Gugino
Spiritual Dr. Morriset
Cary Elwes
Stan's Doctor
Sofía Vergara
Ava
Hector Elizondo
Kominsky
Abigail Breslin
Hailey Doyle
Ludacris
Brendan
Sarah Paulson
Grace Schwab
Alyssa Milano
Nurse Mindy
Jake T. Austin
Seth
Katherine McNamara
Lily Bowman
Nat Wolff
Walter
Yeardley Smith
Maude
Ryan Seacrest
Himself
Michael Bloomberg
Himself
Fiona Choi
Balinese Woman - Resolution Tour
Jim Belushi
Building Super
Mara Davi
Mika
Cassidy Reiff
Piper
Russell Peters
Chef Sunil
Serena Poon
Chef Ming
Common
Soldier
Jackie Seiden
Bride Trish
Joey McIntyre
Groom Rory
Beth Kennedy
Piper's Mom
Larry Miller
Harley (segment "Ahern Party")
Christine Lakin
Waitress Alyssa
Shea Curry
Wendy
Sandra Taylor
Patty
Matthew Broderick
Mr. Buellerton (uncredited)
John Lithgow
Jonathan Cox (uncredited)
Juliette Angelo
Sadie
Mary Marguerite Keane
Pet Adoption Clerk
Barbara Marshall
Head Nurse Helen
Lillian Lifflander
Mrs Lifflander
Penny Marshall
Penny Marshall
Cherry Jones
Mrs Rose Ahern