Gavin and Stacey: how THAT character's return was kept secret

Gavin and Stacey: The Finale
Gavin and Stacey: The Finale (Tom Jackson)

Gavin and Stacey: The Finale has aired, and we finally have almost all of our answers—except, of course, about the fishing trip! The show had plenty of twists and turns, but perhaps the most shocking was that Smithy was still engaged to the rude Sonia instead of Nessa.

The truth about Smithy's engagement - and Sonia's appearance on the show - was kept hugely under wraps by the cast and crew, despite plenty of leaked set photos. So what did it take to hide the character's return from enthusiastic fans?

James revealed that Laura Aikman had to go through a series of diversionary tactics to make sure that no one snapped her on set—and revealed that she was even too worried to attend the press screening with the rest of the cast.

Speaking at the show's Q&A, James gave a shout-out to her, saying: "You're waiting for key moments like that reveal of Sonia - I do feel like it's very important to say that Laura, who plays Sonia, puts in as good a performance as you could ever wish for.

Laura Aikman as Dyan Cannon
Laura Aikman's involvement was kept secret (ITV)

"[She] isn't here for fear of it still somehow leaking, and she stayed in different hotels, she was going into places at the dead of night, and she's not part of [the press screening]—such is her want and our want to try and protect the very feeling that we had here. It would be lovely to give her a round of applause!"

MORE: Gavin and Stacey: The Finale's ending explained - here's how the show conclude

Ruth Jones added that even Laura's parents didn’t know she would be in the show, adding: "She's promised to try and film her parents on Christmas Day because she hasn't even told her mum and dad; she hasn't even said she's in it!"

Mathew Horne, Joanna Page, Alison Steadman, Ruth Jones, Laura Aikman, Rob Brydon, Robert Wilfort and Larry Lamb at the NTAs
Mathew Horne, Joanna Page, Alison Steadman, Ruth Jones, Laura Aikman, Rob Brydon, Robert Wilfort and Larry Lamb at the NTAs (Gareth Cattermole)

James was also full of praise for her portrayal of Sonia, who is clearly the wrong match for Smithy as she often criticised him, berated him for the wrong shoes at the altar, and claimed that she couldn't wait for them to cut ties with Gavin's family.

Gavin and Stacey: The Finale: Smithy (JAMES CORDEN), Gavin (MATHEW HORNE), Stacey (JOANNA PAGE), Nessa (RUTH JONES)
Did you enjoy the finale episode? (Tom Jackson)

He said: "She's amazing, an incredible performance and an almost impossible task. In the hands of anyone else, it would be a cartoon, and I hope she gets celebrated for a pitch-perfect performance."

Gavin and Stacey is now available to watch on BBC iPlayer