Stephen Fry

Narrator (voice)

Johnny Vegas

Robert / Botty

Brian Bovell

Ralph Sheldrake

Sophie Thompson

Valerie

Guy Henry

Martin

Tony Way

Peter

Tom Lenk

Alex

Laura Aikman

Young Valerie

Kiell Smith-Bynoe

Young Ralph

Jane Horrocks

The Aviator

Mark Heap

The Regency Dandy

Brian Blessed

Gavin the Octopus (voice)

James McClelland

Toilet Man

Alex Horne

The Unreason Band (as the Horne Section)