The BBC has released a snippet of the new Gavin and Stacey episode on iPlayer.
The show, which documents the romance and marriage between couple Gavin Shipman and Stacey West, is set to return on Christmas Day for a one-off special.
It was devised by Late Late Show host, James Corden, and writer Ruth Jones, who both also star in the series.
Gavin and Stacey finished in 2010 and saw the title characters expecting their first child, while their friends, Nessa and Smithy (played by Corden and Jones) eventually get together as a couple.
Gavin and Stacey - In pictures
The sneak preview of the new Christmas special appears after the final episode in the last series.
BBC bosses have previously said the episode will show the characters catching up while having a Christmas dinner at Bryn's house in Barry Island, Wales.
And the preview shows Bryn, Stacey's uncle, rushing round a kitchen trying to organise it while Wizzard's hit track, 'I Wish It Could Be Christmas Everyday', plays in the background.
He then checks an iPad and speaks frantically into a walkie-talkie, saying: "Gwen, Jason, anyone. The table should've been set 37 minutes ago. And the plates are still at Stacey's."
Bryn then screams as he drops a bowl of food on the floor, making a large crashing sound.
Gavin and Stacey filming their 2019 Christmas Special - In pictures
Stacey and Nessa then rush in to help, to which Bryn responds: "Stacey, would you kindly inform everyone that dinner will be ever so slightly delayed?"
Corden and Jones announced in the summer that they were writing a new episode nine years after the series three finale.
He previously told GQ magazine that the duo juggled writing the new episode with their transatlantic lives.
"We wrote the new script over FaceTime," he said. "I would get up at 4am, and work with Ruth until it was time to take Max to school … We didn’t tell anyone we were doing it, certainly not the BBC.”
