gavin &amp; stacey is a british sitcom written by james corden and ruth jones about two families: one in billericay, essex; one in barry, south wales. mathew horne and joanna page play the titular characters gavin and stacey and the writers star as smithy and nessa. alison steadman and larry lamb star as gavin's parents (pam and mick), and melanie walters (gwen) is stacey's mother and rob brydon (bryn) is stacey's uncle.