Jason Segel

Peter Bretter

Kristen Bell

Sarah Marshall

Mila Kunis

Rachel Jansen

Russell Brand

Aldous Snow

Bill Hader

Brian Bretter

Jonah Hill

Matthew Van Der Wyk

Liz Cackowski

Liz Bretter

Jack McBrayer

Darald

Maria Thayer

Wyoma

Paul Rudd

Chuck

Jason Bateman

Animal Instincts Detective

William Baldwin

Detective Hunter Rush

Kristen Wiig

Yoga Instructor

Da'Vone McDonald

Dwayne

Steve Landesberg

Dr. Rosenbaum

Kalani Robb

Helpful Hawaiian Waiter

Murray Miller

Photographer

Taylor Wily

Kemo

Kala Alexander

Greg

Francesca Delbanco

Hostess at Buffet

Branscombe Richmond

Keoki

Billy Bush

Billy Bush (Self)

Peter Gray Lewis

Suspect on Animal Instincts

Trula M. Marcus

Lawyer on Crime Scene

Kirk Fox

Mixer

June Diane Raphael

Ann

Ahna O'Reilly

Leslie

Tanisha Harper

Model

Carla Gallo

Gag Me Girl

Cynthia Lamontagne

Female Bartender

Max Alexander

Big Dracula Head

Carla Alapont

Spanish Sex Girl

Michael Oosterom

Puppeteer

Peter Salett

Keyboard Player

Jesse Heiman

Theater Audience Member (uncredited)

Gedde Watanabe

Hotel Manager