Channel 4 viewers can’t believe their eyes – Alison Hammond officially appears on Celebrity Gogglebox sofa with her Sister & Son – Her SH0CKING PROMISE leaves fans stunned!

Alison Hammond‘s rarely-seen sister is set to make her TV debut as the pair team up for Celebrity Gogglebox.

The This Morning presenter, 50, will sit down and watch the latest shows alongside her sister Saundra and son Aidan on Friday evening’s instalment of the Channel 4 programme.

Photos released of the upcoming episode show the trio sat together, with Alison and Saundra holding matching mugs.

The TV star expressed how thrilled she was to be joined by her son and sister, describing Saundra as ‘fabulous’.

She said: ‘I’m so excited to be doing Celebrity Gogglebox with my son Aidan.

‘We’ve always loved watching telly together, and now we get to do it on the sofa for the nation!

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Alison Hammond’s (pictured) rarely-seen sister is set to make her TV debut as the pair team up for Celebrity Gogglebox

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The This Morning presenter, 50, will sit down and watch the latest shows alongside her sister Saundra (left) and son Aidan (centre) on Friday evening’s instalment of the Channel 4 programme

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Photos released of the upcoming episode show the trio sat together, with Alison and Saundra holding matching mugs

‘It’s a real family affair too, because my fabulous sister Saundra is getting involved as well. Expect laughs, eye-rolls, and lots of commentary, classic Hammond style!’

It was previously reported producers were left impressed with the mother and son duo after they recently fronted a BBC Two holiday show, Florida Unpacked.

The trio will be among the new star pairings who will appear on Gogglebox to raise money for Stand Up For Cancer.

A TV insider told The Sun: ‘Producers were impressed by the dynamic between Aidan and his mum on their new travel show, so wanted a piece of it for Celebrity Gogglebox.

‘They’re always looking for new duos to appear on the programme to keep it constantly feeling fresh, and, of course, fronting the Great British Bake Off means she’s already part of the C4 family.’

It comes after Alison gave an insight into her health and fitness regime after dropping 11-stone.

The presenter decided to lose weight after the death of her mother Maria – who had raised concerns over Alison’s pre-diabetic diagnosis.

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It was previously reported producers were left impressed with the mother and son duo after they recently fronted a BBC Two holiday show, Florida Unpacked

Now, she has revealed how she managed to lose 11-stone without the assistance of weight-loss jabs, giving an insight into her exercise plan with her personal trainer.

Alison, who weighed 28-stone at her heaviest, told Heat: ‘I’ve got a personal trainer – she’s amazing, she trains me when I can train.

‘If I’m working, I don’t train, I’ll go for a walk.

‘But when I’m at home, I’ll go and have a session with her in the morning, just an hour. It might be four days a week.’

She also revealed her approach to her diet, saying she hasn’t cut anything out completely but focuses on ‘moderation’.