Declan Donnelly as Ray Santilli

Anthony McPartlin as Gary Shoefield

Bill Pullman as Morgan Banner

Götz Otto as Laszlo Voros

Morwenna Banks as Jasmine

Omid Djalili as Melik

Harry Dean Stanton as Harvey

Mike Blakeley as Camera Team

Matthew Blakeley as Camera Team

John Shrapnel as Michael Kuhn

Madeleine Moffat as Nan

John Cater as Maurice

Lee Oakes as Edgar

Perry Benson as Trading Standards Officer

Jimmy Carr as Gary's Boss

Winston Thomas as Zachary

Michael Rouse as Young Harvey

Pam Shaw as Aunty P

David Threlfall as Jeffrey

Andrew Greenough as Preston

Stephanie Metcalfe as Doreen

Jonathan Coy as Museum Director

Ian Porter as Pentagon Officer

Shane Rimmer as Colonel

Naima Belkhiati as French TV Buyer

Miguel Angel Plaza as Mr. Gonzalez

Jeff Harding as CIA Agent

Kevin Breznahan as Junior TV Exec

Martin McDougall as Middle Ranking TV Exec

Lachele Carl as TV News Anchor

Paul Birchard as Senior TV Exec

Sam Douglas as Network President

Adriana Yanez as Stewardess - Argentina

Nichole Hiltz as Amber Fuentes

Luis Soto as Peruvian TV Host

Cristina Piaget as Interviewer

Christina Souza as Stewardess - Mexicana

Bradley Lavelle as NY host

Orson Bean as Homeless Man

Ray Santilli as Self

Gary Shoefield as Self

Luke Brandon Field as Steve

Julia Bridgeman as Geek Girl

Sophia Ellis as UFO Enthusiast

Jonathan Frakes as Self

Flor Kent as Stewardess

Peter Rnic as The Russian Spy

Todd Sherry as Flight Attendant

Peter Willcock as Worker at Gary's Office

Chris Wilson as Alien Fan

Gillian Goodman as Seller