Steve Whitmire

Kermit the Frog / Rizzo the Rat / Beaker / Elvises (voice)

Dave Goelz

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

Bill Barretta

Pepe the King Prawn / Bobo the Bear / Johnny Fiama / Swedish Chef / Lew Zealand / Howard Tubman / Rowlf the Dog / Elvises (voice)

Eric Jacobson

Miss Piggy / Fozzie Bear / Animal / Yoda / Elvises (voice)

David Arquette

Daniel

Joan Cusack

Rachel Bitterman

Matthew Lillard

Luc Fromage

William H. Macy

Glenn

Whoopi Goldberg

Daniel's 'Boss'

Carson Daly

Self

Kelly Ripa

Self

Joe Rogan

Self

Molly Shannon

Self

Robert Smigel

Triumph, the Insult Comic Dog (voice)

Zach Braff

Dr. John "J.D." Dorian

Kirk R. Thatcher