Jon Favreau / Self
Emma Forbes / Self
Dave Goelz / The Great Gonzo /  Bunsen (voice)
Karolyn Grimes / Self
Joanna Harrison / Self
Melvyn Hayes / Self
Brian Henson / Self
Amanda Holden / Self
David Huddleston / Self
Aled Jones / Self
Patsy Kensit / Self
Taylor Momsen / Self
Barry Norman / Self
Frank Oz / Miss Piggy (voice)
Jenny Powell / Self
Daryl Sabara / Self
Jason Solomons / Self
Debra Stephenson / Self
Daniel Stern / Self
Steve Whitmire / Rizzo the Rat /  Beaker (voice)