Lady Gaga as Self

Elton John as Self

Joseph Gordon-Levitt as Self

Kristen Bell as Self

RuPaul as Self

Steve Whitmire as Kermit the Frog, Beaker, Rizzo the Rat, Statler, Lips (voice)

Eric Jacobson as Miss Piggy, Fozzie Bear, Animal, Sam the Eagle (voice)

Dave Goelz as The Great Gonzo, Dr. Bunsen Honeydew, Waldorf, Zoot (voice)

Bill Barretta as Pepe, The Swedish Chef, Rowlf, Dr. Teeth, Bobo, Big Mean Carl

David Rudman as Scooter, Janice (voice)

Matt Vogel as Floyd Pepper, Lew Zealand, Camilla the Chicken (voice)

Peter Linz as Walter (voice)

James Murray as Additional Muppet Performer (voice)

Kevin Carlson as Additional Muppet Performer (voice)

Tim Blaney as Additional Muppet Performer (voice)

Julianne Buescher as Additional Muppet Performer (voice)

Amanda Balen as Dancer