One Gavin and Stacey let slip a huge spoiler about the hit Christmas special - but it went undetected for months

The Gavin and Stacey finale attracted the largest Christmas Day audience in over a decade. The hit sitcom returned to screens on Christmas Day for a brand-new festive episode, officially wrapping up the stories of its beloved characters from Essex and Barry.

Gavin and Stacey star Laura Aikman, who played Smithy's fiancee Sonia in the hit show, dropped a huge hint about her character in a resurfaced interview