"In New York City for their annual tradition of Christmas Eve debauchery, three lifelong best friends set out to find the Holy Grail of Christmas parties since their yearly reunion might be coming to an end."
Joseph Gordon-Levitt
as Ethan
Seth Rogen
as Isaac
Anthony Mackie
as Chris
Lizzy Caplan
as Diana
Jillian Bell
as Betsy
Mindy Kaling
as Sarah
Michael Shannon
as Mr. Green
Lorraine Toussaint
as Mrs. Roberts
Randall Park
as Boss
Ilana Glazer
as Rebecca Grinch
Nathan Fielder
as Joshua
Heléne Yorke
as Cindy
Aaron Hill
as Tommy Owens
Tracy Morgan
as Narrator / Santa
Darrie Lawrence
as Nana
James Franco
as Self
Miley Cyrus
Kamal Angelo Bolden
as Kamal
Baron Davis
Chuck Muckle
as Piano Playing Uncle
Curt Bouril
as Cindy's Husband
Brooke Liddell
as Cindy's Daugher
Kiley Liddell
as Cindy's Daughter
Jason Mantzoukas
as Bad Santa #1
Jason Jones
as Bad Santa #2
Clem Cheung
as Deli Owner
Harolyn Blackwell
as Opera Singer
Natalie Knepp
as Coat Check Girl
Cameron Earl Thrift
as Singing Kid
Jeremy Vimes
as Hunan Waiter
Gabriel Long
as Karaoke Singer #1
Michaela Sprague
as Isaac's Daughter
Euan Morton
as Coat Check Patron
Marilyn O'Connell
as Old Lady
Richard Hughes
as Train Conductor
Theodora Miranne
as Woman
Nicola Fiore
as Exotic Dancer (uncredited)
Aly Mang
as Party Attendee & Pro Athlete Girlfriend (uncredited)
Marija Skangale
as Snow Globe Dancer (uncredited)
Bill Walters
as Christmas Bartender (uncredited)
Hannah Townsend
as Tommy's Hot Girl (uncredited)
Shawnna Thibodeau
Stunts
Jonathan Levine
Director
Shaun Burke
Associate Producer
Evan Goldberg
Producer
Barbara A. Hall
Executive Producer
Kyle Hunter
Nathan Kahane
Aaron Vexler
Joseph Drake
Screenplay
Ariel Shaffir
Story
Annie Spitz
Production Design
Melissa Toth
Costume Design
Gabe Hilfer
Music Supervisor
Paul Linden
Visual Effects Supervisor
Spencer Wong
Co-Producer
Francine Maisler
Casting
Kathy Driscoll-Mohler
Unit Production Manager
Jonathan Watson
First Assistant Director
Sandi Greenberg
Second Assistant Director
Jeffrey Lee Gibson
Stunt Coordinator
Steven Ritzi
Chris Shriver
Art Direction
Chryss Hionis
Set Decoration
Julia Croon
Script Supervisor
Chris Ann Pappas
Assistant Costume Designer
Natalie Arango
Costume Supervisor
Mindy Hall
Makeup Department Head
Ashley Ryan
Makeup Artist
Matiki Anoff
Nathan J. Busch II
Hair Department Head
Christof Gebert
Production Sound Mixer
Hinju Kim
Assistant Art Director
Peter Dorsey
Diana Salzburg
Assistant Set Decoration
Michael Babcock
Supervising Sound Editor
Sound Re-Recording Mixer
Jeff Campbell
Neishaw Ali
Visual Effects Producer
J.P. Giamos
Ray Fisher
Leadman
Michael Flynn
Line Producer
Alex McAtee
Sasha Paracels
Ben Waisbren
James Weaver
Zene Baker
Editor
Marco Beltrami
Original Music Composer
Brandon Trost
Director of Photography
Jenna Hellmuth
Stunt Double
Miles Hankins
Music