Jane Krakowski

Character: Claire's Mom

Richard Griffiths

Character: Santa Claus

Steve Whitmire

Character: Kermit the Frog / Rizzo the Rat / Statler / Beaker (voice)

Madison Pettis

Character: Claire

Whoopi Goldberg

Character: Taxi Driver

Dave Goelz

Character: The Great Gonzo / Waldorf / Dr. Bunsen Honeydew / Zoot (voice)

Bill Barretta

Character: Pepe the Prawn / Swedish Chef / Rowlf / Dr. Teeth / Bobo the Bear / Husband Pigeon (voice)

Michael Bloomberg

Character: Himself (as Mayor Michael Bloomberg)

Eric Jacobson

Character: Fozzie Bear / Miss Piggy / Animal / Sam the Eagle (voice)

Matt Vogel

Character: Floyd Pepper / Lew Zealand / Crazy Harry / Robin the Frog / Son Pigeon / Additional Muppets (voice)

David Rudman

Character: Scooter / Janice / Additional Muppets (voice)

Nathan Lane

Character: Officer Meany

Jesse L. Martin

Character: Postal Worker

Petra Němcová

Character: Beaker's Girlfriend

Steve Schirripa

Character: Mobster

Tony Sirico

Character: Mobster

Uma Thurman

Character: Joy

Paul Williams

Character: Elf

Pam Arciero

Character: Additional Muppets (voice)

Heather Asch

Character: Additional Muppets (voice)

Tyler Bunch

Character: Wife Pigeon / Additional Muppets (voice)

Leslie Carrara-Rudolph

Character: Additional Muppets (voice)

Stephanie D'Abruzzo

Character: Additional Muppets (voice)

James Godwin

Character: Additional Muppets (voice)

James J. Kroupa

Character: Additional Muppets (voice)

Tim Lagasse

Character: Additional Muppets (voice)

Peter Linz

Character: Additional Muppets (voice)

Noel MacNeal

Character: Sweetums / Additional Muppets (voice)

Jim Martin

Character: Additional Muppets (voice)

Paul McGinnis

Character: Additional Muppets (voice)

Martin P. Robinson

Character: Sweetums / Additional Muppets (voice)

Nadine Ellis

Character: Dancer

Kevin Sateri

Character: Dancer

Douglas Caldwell

Character: Dancer

Mary Ann Lamb

Character: Dancer

Terrance Reddick

Character: Dancer

Warren Adams

Character: Dancer

Paul Becker

Character: Postal Dancer

Peter Conboy

Character: Holiday Commuter

Paul T. Gosselin

Character: Postal Customer

Bill Timoney

Character: Additional Voices

Guy Veryzer

Character: Mailman