Gavin & Stacey co-creator Ruth Jones has hinted that fans could one day find out whether Smithy agrees to marry Nessa.
Last year's one-off Christmas special finished on a cliffhanger when her character Nessa proposed to Smithy, played by James Corden, leaving fans apoplectic that they wouldn’t discover what would happen next.
Jones said the "door is closed but it's not locked" on further episodes of the hit BBC comedy, which she wrote with Corden, who now hosts The Late Late Show in the US.
And while there are no imminent plans to bring the Wests and Shipmans back to TV, speaking at Cheltenham Literature Festival to promote her new novel, Us Three, Ruth said: “Your guess is as good as mine, that's the truth.
"All I can say is there are no plans at the moment, but then I say that and people go 'Yeah, but you used to say that before and then you did suddenly announce...'
"I am telling you the truth - there are no plans at the moment to write any more. But, as I said to somebody the other day, the door is closed but it's not locked.
"I don't think it's a case of us kind of going 'We're never going to do any more' but it is a case of we really just don't have the space."
The hugely successful Christmas special drew an audience of 18 million people and was the most-watched comedy show of the last decade.
Ruth lives in Cardiff with her husband, David Peet, and three stepchildren, while Corden is based in the US.
"How do we get together to do it? He's not in my bubble. I'm not about to get on a plane to LA. But you know, who knows, who knows," Jones said.
Jones said she and her husband are currently writing two screenplays, one a comedy and the other a drama, in which she will appear.
"I have to be careful what I say because the process is quite a long one and you can't announce anything until it's been greenlit and all that kind of stuff," she said.
"There are plans afoot."
