Kristen Bell Sarah Marshall
Rose Byrne Jackie Q
Jonah Hill Aaron Green
Tom Felton Tom Felton
Elisabeth Moss Daphne Binks
Sean Combs Sergio Roma
Aziz Ansari Matty Briggs
Judd Apatow Producer
Kristen Schaal Today Show Production Assistant
Colm Meaney Jonathan Snow
Jake Johnson Jazz Man
Russell Brand Aldous Snow
Christina Aguilera Self
Melissa Yonkey Hair Department Head
Ellie Kemper Pinnacle Executive
Doc Duhame Stunts
Carla Gallo Destiny
Christine Nguyen Lap Dancer in Vegas
Dee Snider Dee Snider
Jamie Sives Aldous's Mate in London
Lindsey Broad Pocket Dial Girl
T.J. Miller Brian
Ato Essandoh Smiling African Drummer
Nick Kroll Kevin McLean
Jeffrey A. Cook Electrician
Andy Malcolm Foley Artist
Mario López Self
Wendy Hoffmann ADR Voice Casting
Da'Vone McDonald Sergio's Security Guard
Ranjani Brow ADR Voice Casting
Jeanne McCarthy Casting
Derek Theler Standard Guest
Meredith Vieira Meredith Vieira
Jessica Ellerby Club Girl in London
Meghan, Duchess of Sussex Tatiana
Tonya Kay Model
Jim Piddock Limousine Driver in London
Lino Facioli Naples
Natalina Maggio Hot Club Dancer
Rodney Rothman Producer
Nicholas Dashnaw Stunts
Andrew Burlinson Hipster in Crowd at Standard Hotel
Lars Ulrich Self
José Ramón Rosario Limousine Driver in NY
G.A. Aguilar Stunt Coordinator
Jeff 'JJ' Dashnaw Stunt Coordinator, Second Unit Director
Peter McManus Production Accountant
Greg Steele ADR Mixer
Anne Fletcher Choreographer
Lonnie Henderson American Soldier (uncredited)
Jason Segel Characters, Co-Producer
Rick Schroder Ricky Schroder
Ariel Gold Key Costumer
Sarah Sprague Production Coordinator
Pharrell Williams Self
Leslie A. Pope Set Decoration
Hope Slepak Costume Supervisor
Joe Bucaro III Stunts
Larry Kemp Dialogue Editor
Stephanie Faracy Wendy
Sean Mannion Property Master, Today Show Sound Guy
Goro Koyama Foley Artist
Richard Boyle Best Boy Grip
Ross Simpson Boom Operator
Lisa Rodgers Post Production Supervisor
Gary J. Perticone Key Hair Stylist
Robert D. Yeoman Director of Photography
Jonathan Karp Music Supervisor, Music Editor
Jonathan Ryland Servant Dude
Chris Wilson London Executive
Nicholas Stoller Director, Writer, Producer
Troy Brown Stunt Driver