Ricky Gervais

Dominic Badguy

Ty Burrell

Jean Pierre Napoleon

Tina Fey

Nadya

Steve Whitmire

Kermit the Frog / Foo-Foo / Statler / Beaker / Lips / Rizzo the Rat / Link Hogthrob / The Newsman (voice)

Eric Jacobson

Miss Piggy / Fozzie Bear / Animal / Sam Eagle (voice)

Dave Goelz

The Great Gonzo, Dr. Bunsen Honeydew, Zoot, Beauregard, Waldorf

Bill Barretta

Pepe the King Prawn / Rowlf the Dog / Dr. Teeth / The Swedish Chef / Bobo the Bear / Big Mean Carl / Baby Boss / Carlo Flamingo / Leprechaun Security Guard (voice)

David Rudman

Scooter / Janice / Miss Poogy / Bobby Benson / Wayne (voice)

Matt Vogel

Constantine / Floyd Pepper / Sweetums / Pops / Robin / Lew Zealand / Crazy Harry / 80's Robot / Camilla / Uncle Deadly (voice)

Peter Linz

Walter / Manolo Flamingo (voice)

Tony Bennett

Tony Bennett

Hugh Bonneville

Irish Journalist

Tom Hiddleston

The Great Escapo

Ross Lynch

Young Florist

Salma Hayek Pinault

Salma Hayek

Ray Liotta

Big Papa

Danny Trejo

Danny Trejo

Stanley Tucci

Ivan the Guard

Jemaine Clement

Prison King

Zach Galifianakis

Hobo Joe

Tom Hollander

Theater Manager

Toby Jones

Prado Museum Guard #2

Frank Langella

Beefeater Vicar

James McAvoy

UPS Guy

Chloë Grace Moretz

Newspaper Girl

Miranda Richardson

Berliner at Window

Saoirse Ronan

Ballet Dancer

Til Schweiger

German Cop

Russell Tovey

Delivery Man

Christoph Waltz

Christoph Waltz

Mackenzie Crook

Prado Museum Guard #1

Sean Combs

Sean Combs

Rob Corddry

First AD

Lady Gaga

Lady Gaga

Josh Groban

Maximum Security Prisoner

Kenneth Collard

Berliner #1

William Brand

Berliner #2

Usher

The Usher

Louise Gold

Annie Sue / UK Muppet Performer (voice)

Mak Wilson

UK Muppet Performer (voice)

Don Austen

UK Additional Muppet Performer (voice)

Céline Dion

Piggy Fairy Godmother

Lee Nicholas Harris

Fruit & Vegetable Stall Holder

Vander McLeod

Gulag Captain

James Murray

LA Muppet Performer (voice)

Mike Quinn

LA Muppet Performer (voice)

Dave Chapman

UK Additional Muppet Performer (voice)

Dexter Fletcher

(uncredited)

Peter Serafinowicz

Gulag Guard (uncredited)

Jim Henson

Kermit The Frog (archival recordings) (uncredited)

Jerry Nelson

Announcer (voice) (uncredited)

Debby Ryan

Wedding Guest (uncredited)

Bridgit Mendler

Wedding Guest (uncredited)

Tyrel Jackson Williams

Wedding Guest (uncredited)

Jake Short

Wedding Guest (uncredited)