Gary

Jason Segel

Mary

Amy Adams

Tex Richman

Chris Cooper

Kermit / Beaker / Statler / Rizzo / Link / Newsman (voice)

Steve Whitmire

Veronica Martin

Rashida Jones

Tour Guide

Alan Arkin

Miss Piggy / Fozzie / Animal / Sam Eagle / Marvin Suggs (voice)

Eric Jacobson

Gonzo / Honeydew / Zoot / Beauregard / Waldorf (voice)

Dave Goelz

James Carville

James Carville

Walter (voice)

Peter Linz

Junior CDE Executive

Donald Glover

Swedish Chef / Rowlf / Teeth / Pepe / Bobo / Muppet Gary (voice)

Bill Barretta

Leslie Feist

Leslie Feist

Punch Teacher Host

Ken Jeong

Scooter / Janice / Miss Poogy

David Rudman

Pepper / Camilla / Sweetums / Robot / Deadly / Harry (voice)

Matt Vogel

Judd Hirsch

Judd Hirsch

Rico Rodriguez

Rico Rodriguez

Jack Black

Jack Black

Whoopi Goldberg

Whoopi Goldberg

Grandfather

Bill Cobbs

Hobo Joe

Zach Galifianakis

Neil Patrick Harris

Neil Patrick Harris

Selena Gomez

Selena Gomez

John Krasinski

John Krasinski

Human Walter

Jim Parsons

Mickey Rooney

Mickey Rooney

Postman

Eddie Pepitone

Moderator

Kristen Schaal

Greeter

Sarah Silverman

TV Executive

Eddie 'Piolin' Sotelo

Miss Piggy's Receptionist

Emily Blunt

Elderly Asian Man

Raymond Ma

Elderly Asian Woman

Shu Lan Tuan

TV Executive

Dahlia Waingort

Reporter One

Jonathan Palmer

Reporter Two

Don Yanan

TV Executive

Michael Albala

"Punch Teacher" Kid

Julia Marie Franzese

Gary Age 6

Gunnar Smith

Gary Age 9

Connor Gallagher

Gary Age 13

Justin Marco

Laughing Kid

Cameron Kasal

Laughing Kid

Justin Tinucci

Laughing Kid

Alex Long

Waitress

Aria Noelle Curzon

Animool

Dave Grohl

Kermit, der Frosch

Stefan Kaminski

Fozzie Moopet / Thog / Additional Muppet Performer (voice)

Tyler Bunch

Additional Muppet Performer (voice)

Bruce Lanoil

Miss Piggy

Christian Gaul

Additional Muppet Performer (voice)

Michelan Sisti

Walter

Patrick Bach

Additional Muppet Performer (voice)

Paul McGinnis

Additional Muppet Performer (voice)

Greg Ballora

Additional Muppet Performer (voice)

David Alan Barclay

Additional Muppet Performer (voice)

Tim Blaney

Additional Muppet Performer (voice)

Kevin Carlson

Additional Muppet Performer (voice)

Leslie Carrara-Rudolph

Additional Muppet Performer (voice)

Kristin Charney

Additional Muppet Performer (voice)

Nathan Danforth

Afghan Hound / Wanda / Additional Muppet Performer (voice)

Alice Dinnean

Additional Muppet Performer (voice)

Julia Gunn

Additional Muppet Performer (voice)

BJ Guyer

Additional Muppet Performer (voice)

Tanya Haden

Additional Muppet Performer (voice)

Patrick Johnson

Additional Muppet Performer (voice)

Sean W. Johnson

Additional Muppet Performer (voice)

Len Levitt

Additional Muppet Performer (voice)

James Murray

Additional Muppet Performer (voice)

Michael Oosterom

Additional Muppet Performer (voice)

Karen Prell

Additional Muppet Performer (voice)

Mike Quinn

Additional Muppet Performer (voice)

David Skelly

Additional Muppet Performer (voice)

Andy Stone

Additional Muppet Performer (voice)

Art Vega

Additional Muppet Performer (voice)

Alex Villa

TV Executive

Eddie "Piolin" Sotelo

Additional Muppet Performer (voice)

Chase Woolner

Scout Troop Leader (uncredited)

Mike Carlucci

Punch Teacher Contestant (uncredited)

Reese Hartwig

Telethon Announcer (voice) (uncredited)

Jerry Nelson

Kermit the Frog (archive voice) (uncredited)

Jim Henson

Himself (uncredited)

Ricky Gervais