Seth Rogen

Character: Ben Stone

Katherine Heigl

Character: Alison Scott

Paul Rudd

Character: Pete

Leslie Mann

Character: Debbie

Jason Segel

Character: Jason

Jay Baruchel

Character: Jay

Jonah Hill

Character: Jonah

Martin Starr

Character: Martin

Charlyne Yi

Character: Jodi

Iris Apatow

Character: Charlotte

Maude Apatow

Character: Sadie

Joanna Kerns

Character: Alison's Mom

Harold Ramis

Character: Ben's Dad

Alan Tudyk

Character: Jack

Kristen Wiig

Character: Jill

Bill Hader

Character: Brent

Ken Jeong

Character: Dr. Kuni

Craig Robinson

Character: Club Doorman

Tim Bagley

Character: Dr. Pellagrino

Loudon Wainwright III

Character: Dr. Howard

Stephanie Mnookin

Character: Dr. Howard's Nurse

Adam Scott

Character: Samuel

J. P. Manoux

Character: Dr. Angelo

Mo Collins

Character: Female Doctor

B. J. Novak

Character: Young Doctor

Tami Sagher

Character: Wardrobe Lady

Brianna Brown

Character: Alison's Friend

Catherine Reitman

Character: Alison's Friend

Nick Thune

Character: Alison's Friend

Paul Feig

Character: Fantasy Baseball Guy

Ben Meyerson

Character: Fantasy Baseball Guy

Wayne Federman

Character: Fantasy Baseball Guy

Melinda Bennett

Character: Dr. Pellagrino's Nurse

Matthew McKane

Character: Club Bartender

Steven Brill

Character: Ben's Boss

Ana Mercedes

Character: Maria

Nadine Griffith

Character: Maternity Nurse at Desk

Diane Schaller

Character: Delivery Nurse

Emersen Riley

Character: Jonah's Girlfriend

Stormy Daniels

Character: Lap Dancer

Nautica Thorn

Character: Lap Dancer

Mary Brill

Character: Real Estate Agent

Lolita Mastrolia

Character: Daughter in Waiting Room

Joseph T. Mastrolia

Character: Father in Waiting Room

Tracy Hartley

Character: Lamaze Instructor

Jeffrey L. Wilson

Character: Record Store Customer

Jessica Alba

Character: Self (uncredited)

Steve Carell

Character: Self (uncredited)

Andy Dick

Character: Self (uncredited)

James Franco

Character: Self (uncredited)

Eva Mendes

Character: Self (uncredited)

Ryan Seacrest

Character: Self (uncredited)

Dax Shepard

Character: Self (uncredited)

Michelle Woods

Character: Waitress (uncredited)