Harry Hill as Harry Hill

Julie Walters as Nan

Simon Bird as Vet

Guillaume Delaunay as Kisko

Sheridan Smith as Michelle

Julian Barratt as Conch

Johnny Vegas as Abu (voice)

Marc Wootton as Barney Cull

Jim Broadbent as Cleaner

Matt Lucas as Otto

Camilla Beeput as Veterinary Receptionist

Shingai Shoniwa as Station Attendant

Tim Key as Toilet Attendant

Dave Thompson as Brain Number Two

Jon Wennington as Motorist (uncredited)