However, it emerged that Smithy was in fact marrying his girlfriend, Sonia, who is quite frankly a stuck up b**ch. This development was much to the chagrin of Smithy's family and friends, who also didn't take kindly to Sonia.

Gavin and Stacey star Laura Aikman, 39, stole the show as Sonia in the long-awaited finale – and fans are concerned. The beloved BBC comedy finally returned five years after leaving us on the agonising cliff-hanger when Nessa ( Ruth Jones) proposed to Smithy ( James Corden) after he’d rowed with girlfriend Sonia.

"Gavin & Stacey" star Laura Aikman took her NDA so seriously she even kept her appearance in the 90-minute special a secret from her own family. Aikman, who plays the widely-disliked Sonia in the cult BBC series,

During the Christmas day finale, fans were on the edge of their seats when Smithy's ( James Corden ) fiancée was revealed as Laura's character Sonia, rather than Ruth Jones' Nessa.