A major Gavin and Stacey cast announcement has been revealed as an award-winning actor makes a surprise return to the BBC comedy. 

The actor, who previously starred in the show, is set to make a cameo in the upcoming Christmas Special. 

The star played a larger than life character in series one and two of the hit show and was spotted filming their scenes over the weekend.

Sheridan Smith, who plays Rudi, the younger sister to James Corden's Smithy, has reprised her role for the finale episode. 

The actress, 43, didn't star in the 2019 Christmas Special but has reportedly been back on Barry Island for the latest round of filming. 

A major Gavin and Stacey cast announcement has been revealed as an award-winning actor makes a surprise return to the BBC comedy

A major Gavin and Stacey cast announcement has been revealed as an award-winning actor makes a surprise return to the BBC comedy 

Sheridan Smith , who plays Rudi, the younger sister to James Corden 's Smithy, has reprised her role for the finale episode  (pictured)

Sheridan Smith , who plays Rudi, the younger sister to James Corden 's Smithy, has reprised her role for the finale episode  (pictured)

The actress, 43, didn't star in the 2019 Christmas Special but was back on Barry Island for the latest round of filming marking her return after more than 10 years

The actress, 43, didn't star in the 2019 Christmas Special but was back on Barry Island for the latest round of filming marking her return after more than 10 years

A source told The Sun the actress stepped right back in to Rudy's shoes and it was 'like no time had passed at all'.

The source added: 'Sheridan was over the moon she could go back into the fold and her scenes are brilliant.' 

Sheridan is not only a familiar face to Gavin and Stacey fans, but the actress, who recently starred in Opening Night in London's West End is also a familiar face to writer James. 

The pair dated during their time on the hit BBC sitcom between 2007 and 2009, and the former US talk show host even called her the 'love of his life' before they split. 

The two actors have remained on good terms and no doubt fans are excited for the surprise cameo this Christmas.  

Barry Island has been busy the past couple of weeks and recently James, Ruth Jones, who plays Nessa, and Oscar Hartland who plays Neil the baby were spotted filming in the street. 

Emerging from the car on Friday afternoon Oscar was seen waving to fans and throwing up the peace sign as he waited to film his scenes.

Meanwhile James was also seen carrying a guitar suggesting their could be a musical number in the highly-anticipated final episode.

A source told The Sun the actress stepped right back in to Rudi's shoes and it was 'like no time had passed at all'

A source told The Sun the actress stepped right back in to Rudi's shoes and it was 'like no time had passed at all'

James and Sheridan dated during their time on the hit BBC sitcom between 2007 and 2009, and the former US talk show host even called her the 'love of his life' before they split

James and Sheridan dated during their time on the hit BBC sitcom between 2007 and 2009, and the former US talk show host even called her the 'love of his life' before they split

On Friday morning Mathew Horne shared an adorable moment with fans as he took time out of filming to share his birthday cake

On Friday morning Mathew Horne shared an adorable moment with fans as he took time out of filming to share his birthday cake

Uncle Bryn also joined the gang as he was seen dressed in his typical smart shirt, tie and beige tailored trousers.

The finale will also star Joanna Page as Stacey and Mathew Horne as Gavin, as the whole gang reunite for the first time since the last Christmas episode in 2019.

On Friday morning Mathew shared an adorable moment with fans as he took time out of filming to share his birthday cake.

Mathew, 46, appeared on set for the first time on Thursday, reuniting with James Corden following their feud.

The actor ran over to fans with his giant birthday cake which they had bought him, as he pretended to nearly trip and drop it, asking: 'Has anyone got any cutlery?'

Mathew was in complete awe of fans supporting his character 'Gavalar' during filming on Barry Island.

As he walked up the hill while eating chocolate from his cake, fans sang 'Happy Birthday' to him.

Another fan shouted: 'GAV-A-LAR!'

Laughing and taking a bow, he joked: 'Thank you! Has anyone got any cutlery? No? We should swan into one of these houses and get some knives and stuff.

'I want you to take that [the cake] and share it', he told fans.

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