When Kermit the Frog and the Muppets learn that their beloved theater is slated for demolition, a sympathetic human, Gary, and his puppet brother, Walter, swoop in to help the gang put on a show and raise the $10 million they need to save the day.
Gary
Jason Segel
Mary
Amy Adams
Tex Richman
Chris Cooper
CDE Executive
Rashida Jones
Kermit / Beaker / Statler / Rizzo / Link / Newsman (voice)
Steve Whitmire
Walter (voice)
Peter Linz
Miss Piggy / Fozzie / Animal / Sam Eagle / Marvin Suggs (voice)
Eric Jacobson
Gonzo / Honeydew / Zoot / Beauregard / Waldorf (voice)
Dave Goelz
Swedish Chef / Rowlf / Teeth / Pepe / Bobo / Muppet Gary (voice)
Bill Barretta
Scooter / Janice / Miss Poogy / Wayne (voice)
David Rudman
Pepper / Camilla / Sweetums / Robot / Deadly / Harry (voice)
Matt Vogel
Tour Guide
Alan Arkin
Grandfather
Bill Cobbs
Hobo Joe
Zach Galifianakis
Punch Teacher Host
Ken Jeong
Human Walter
Jim Parsons
Postman
Eddie Pepitone
Moderator
Kristen Schaal
Greeter
Sarah Silverman
TV Executive
Eddie 'Piolin' Sotelo
Elderly Asian Man
Raymond Ma
Elderly Asian Woman
Shu Lan Tuan
Junior CDE Executive
Donald Glover
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
Miss Piggy's Receptionist
Emily Blunt
James Carville
James Carville
Smalltown Resident
Leslie Feist
Whoopi Goldberg
Whoopi Goldberg
Selena Gomez
Selena Gomez
Animool
Dave Grohl
Neil Patrick Harris
Neil Patrick Harris
Judd Hirsch
Judd Hirsch
John Krasinski
John Krasinski
Rico Rodriguez
Rico Rodriguez
Smalltown Resident
Mickey Rooney
Fozzie Moopet / Thog / Additional Muppet Performer (voice)
Tyler Bunch
Additional Muppet Performer (voice)
Bruce Lanoil
Additional Muppet Performer (voice)
Michelan Sisti
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
Additional Muppet Performer (voice)
Chase Woolner
Jack Black (uncredited)
Jack Black
Scout Troop Leader (uncredited)
Mike Carlucci
Punch Teacher Contestant (uncredited)
Reese Hartwig
Telethon Announcer (voice) (uncredited)
Jerry Nelson