Jonah Hill as Aaron Green

Russell Brand as Aldous Snow

Rose Byrne as Jackie Q

Elisabeth Moss as Daphne Binks

Tyler McKinney as African Child in Video

Zoe Salmon as Zöe Salmon

Lino Facioli as Naples

Eric Marshall as Concert goer

Lars Ulrich as Self

Mario López as Self

Pink as Self

Billy Bush as Billy Bush

Kurt Loder as Kurt Loder

Christina Aguilera as Self

Colm Meaney as Jonathan Snow

Ray Siegle as Paparazzo in LA

Chad Cleven as Paparazzo in LA

Jonathan Chris Lopez as Paparazzo in LA

Vero Felice Monti as Paparazzo in LA

Danny O'Leary as Danny O'Leary

Aziz Ansari as Matty Briggs

Sean Combs as Sergio Roma

Kali Hawk as Kali Coleman

Nick Kroll as Kevin McLean

Brandon Johnson as Pinnacle Executive

Ivan Shaw as Pinnacle Executive

Ellie Kemper as Pinnacle Executive

Jake Johnson as Jazz Man

Da'Vone McDonald as Sergio's Security Guard

Derek Ressallat as Dr. Coltrane

Karl Theobald as Duffy Servant Dude

Dinah Stabb as Lena Snow

Gee Sekweyama as Aldous's Mate in London

Jamie Sives as Aldous's Mate in London

Tom Felton as Tom Felton

Zoe Richards as Club Girl in London

Jessica Ellerby as Club Girl in London

Tony van Silva as Old Man on Bike

Meddy Ford as Party Girl in Limo

Rebecca Kinder as Party Girl in Limo

Jim Piddock as Limousine Driver in London

Kristen Bell as Sarah Marshall

Rick Schroder as Ricky Schroder

Ryan Shiraki as Rianna the Hairdresser

José Ramón Rosario as Limousine Driver in NY

Pharrell Williams as Self

Kristen Schaal as Today Show Production Assistant

Meredith Vieira as Meredith Vieira

Sean Mannion as Today Show Sound Guy

David Auerbach as Today Show Stage Manager

Howard Strawbridge as Today Show Lighting Director

Stephen G. Lucas as Today Show Director

Paul Krugman as Self

Lenny Widegren as Infant Sorrow Guitarist

Roger Joseph Manning Jr. as Infant Sorrow Keyboardist / Guitarist

Sean Hurley as Infant Sorrow Bassist

Victor Indrizzo as Infant Sorrow Drummer

Ato Essandoh as Smiling African Drummer

Aurora Nonas-Barnes as Oak Room Girl

Jennifer Perry as Flirtatious Party Girl

Lindsey Broad as Pocket Dial Girl

Nicole Sciacca as Dancer at Nightclub in NY

Thomas Nowell as S&M Guy Who Looks Like Moby

Duane Sequira as Drug Dealer in NY

Ronald J. Garner as TSA Agent at JFK

Joyful Drake as Sergio's Baby Mama

Francesca Delbanco as Admiral Club Attendant

T.J. Miller as Brian

Neal Brennan as Guy at Brian's House

Stephanie Faracy as Wendy

Brian Duprey as Frank Look-Alike

Kyle Diamond as Sammy Look-Alike

Thomas R. Wallek as Joey Look-Alike

Drew Anthony Carrano as Dean Look-Alike

Kelly Ann Buckman as Waitress in Vegas

Giusy Castiglione as Lap Dancer in Vegas

Christine Nguyen as Lap Dancer in Vegas

Diana Terranova as Lap Dancer in Vegas

Ava Vassileva as Topless Party Girl

Carla Gallo as Destiny

Carlos Jacott as Navigator Driver in Vegas

Rino Romano as Announcer (voice)

Joe Benson as DJ (voice)

Sarah Haskins as Girl in Crowd at Standard Hotel

Andrew Burlinson as Hipster in Crowd at Standard Hotel

Tom Chadwick as Tom the Assistant

Mike Viola as Furry Walls Rhythm Guitarist

Dan Rothchild as Furry Walls Bassist

Dayton Knoll as VH1 Storyteller Audience Member

George Aloi as Airline Passenger

Aiden Cardei as Concert Goer

Peter Conboy as Soccer Coach

Daniela Dakich as Aldous Groupie

Deanna Gibson as Fan

Lonnie Henderson as American Soldier (uncredited)

Richard Hochman as Valet

Robert Scott Howard as Jon

Annie Hsu as Club Patron In New York

Jill Jordan as Entourage Girl

Benjamin Kanes as Singing Concert Fan

Tonya Kay as Model

Kristen Marie Kelly as Obsessed Fan

Jian Leonardo as Model

Natalina Maggio as Hot Club Dancer

Meghan, Duchess of Sussex as Tatiana

Thomas J. Post as Paparazzi in Las Vegas

Kirsten Roeters as Flight Attendant

Daniel Robaire as Drunk Bachelor

Jonathan Ryland as Servant Dude

Dee Snider as Dee Snider

Derek Theler as Standard Guest

Julia Tokarz as Aldous Snow Fan

Magali Widmer as Dancer

Chris Wilson as London Executive

Alexandra Wright as Concert Fan

Michael Bravo as Strip Pedestrian (uncredited)