As Nessa and the Wests head to Essex to spend Christmas with the Shipmans, Gavin and Stacey have a startling announcement to make.

Mathew Horne
as Gavin Shipman

Joanna Page
as Stacey Shipman

Alison Steadman
as Pam Shipman

James Corden
as Neil 'Smithy' Smith

Larry Lamb
as Mick Shipman

Ruth Jones
as Nessa Jenkins

Melanie Walters
as Gwen West

Rob Brydon
as Bryn West

Julia Davis
as Dawn Sutcliffe

Steffan Rhodri
as Dave Coaches