Gavin and Stacey star Rob Brydon has revealed that the show's much-anticipated Christmas finale will 'wrap up' all of the show's long-running storylines.

The iconic BBC comedy is set to return on Christmas Day for its last ever episode, with fans hoping to see the outcome of the dramatic proposal cliffhanger.

Speaking on Heart Breakfast with Jamie Theakston and Davina McCall, who is filling in for Amanda Holden, Rob admitted that he and much of the cast are yet to see the full script for the festive special.

Creators James Corden and Ruth Langsford confirmed last month that the finale script had been completed, with BBC bosses recently saying that even they are yet to see the story for the final episode, over fears it could be leaked.

Quizzed about the upcoming episode, Rob jokingly quipped: 'Having read it, they handled Bryn's funeral really sensitively! I was worried I wasn't going to be in it, but they've got loads of flashbacks!'

Gavin and Stacey star Rob Brydon has revealed that the show's much-anticipated Christmas finale will 'wrap up' all of the show's long-running storylines

Gavin and Stacey star Rob Brydon has revealed that the show's much-anticipated Christmas finale will 'wrap up' all of the show's long-running storylines

The actor is set to reunite with the cast of the iconic BBC comedy for its last ever episode

The actor is set to reunite with the cast of the iconic BBC comedy for its last ever episode

On a serious note, the comic added: 'Do you know what, I know some of the stuff that happens, but I don’t think any of the cast have seen the script yet. 

'They told me one or two little bits of bobs had happened, and I believe it does wrap it all up.'

Rob is expected to reprise his role as Stacey's beloved Uncle Bryn in the comedy, with fans hoping they'll finally learn the truth about what went on during the infamous fishing trip.

James and Ruth have gone to such extreme lengths to prevent leaks they haven't even let the BBC's Director of Comedy Jon Petrie read the completed script.

In a bid to stop any plot details ruining the sitcom's one-off finale, the writing pair, who also star in the show, have only shown the script to a 'very, very tight circle.'

And not even Petrie has made the cut, despite him commissioning the episode as the BBC's big draw for this year's Christmas schedule.

'I genuinely still haven't seen the script, James and Ruth won't let us look at it yet,' he said at the BBC's comedy showcase on Tuesday.

'Which I think is great, they are really keeping it under wraps and don't want people to see it outside of their very, very tight circle until they're 100 per cent certain of it.'

Creators James Corden and Ruth Langsford confirmed last month that the finale script had been completed

Creators James Corden and Ruth Langsford confirmed last month that the finale script had been completed 

Speaking on Heart Breakfast with Jamie Theakston and Davina McCall , who is filling in for Amanda Holden , Rob admitted that he and much of the cast are yet to see thescript

Speaking on Heart Breakfast with Jamie Theakston and Davina McCall , who is filling in for Amanda Holden , Rob admitted that he and much of the cast are yet to see thescript 

Rob is expected to reprise his role as Stacey's beloved Uncle Bryn in the comedy, with fans hoping they'll finally learn the truth about what went on during the infamous fishing trip

Rob is expected to reprise his role as Stacey's beloved Uncle Bryn in the comedy, with fans hoping they'll finally learn the truth about what went on during the infamous fishing trip

Petrie said the real challenge will come when filming starts as it's such a high profile show and recognisable cast that people in the filming locations will be able to spot them.

'I think it will be hard when they are filming it because it's such a huge show and everyone will want to watch, everyone in all the locations where it's shot, it will be obvious what's being shot,' he said.

'I suppose you have to take it as a compliment that it means so much to so many people.'

Despite having not seen the script, Jon said James and Ruth have come up with a 'brilliant idea and a brilliant story.'

James and Ruth reunited to pen the tightly-guarded new script after the former Late, Late Show host moved back to the UK after eight years living in Los Angeles.

Main characters Mathew Horne, 45, and Joanna Page, 47, will return, alongside series regulars Rob Brydon, 59, Alison Steadman, 77, and Larry Lamb, 76.

The Bafta-winning comedy originally aired for three seasons between May 2007 and January 2010 and returned on Christmas Day 2019 with a special episode.

A ratings hit for the BBC, an impressive 18.49m people tuned in to watch the episode which ended with Ruth's Nessa professing her love for Corden's Smithy and getting down on one knee.

The most-watched scripted programme of the decade, fans were left wanting more as the episode ended before Smithy's reply.

Listen to Heart Breakfast with Jamie Theakston and Amanda Holden weekdays from 06:30am to 10am and on Global Player.