Holly Willoughby couldn’t contain her shock after she was reunited with her ex-boyfriend in a toe-curling TV moment.

In Saturday’s upcoming episode of Michael McIntyre’s Big Show, the former This Morning host was greeted with a familiar face, who she once declared her love to.

The unsuspecting presenter, 44, came in for the full treatment on the primetime programme, which invites celebrities sharing insights into their personal lives while springing the odd surprise, as a handsome man suddenly arrived on stage.

The penny immediately dropped for Holly, who put her hands over her face in shock, as she realised it was none other than childhood sweetheart Oliver.

Michael then asked the tall man, who wore a navy shirt with navy jeans, about his past romance with the now famous TV star.

He said: ‘Obviously you had this incredibly intense romance with Holly, do you have any memorabilia or keepsakes from this?’

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Holly Willoughby was left shocked after she was reunited with her ex-boyfriend on Saturday’s upcoming episode of Michael McIntyre’s Big Show

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The former This Morning host was greeted with a familiar face, who she once declared her ‘love’ to, and put her hands over her face in shock

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The penny had immediately dropped for Holly as she realised it was none other than her childhood sweetheart Oliver

Oliver, it turns out, had something hidden away in his pocket, replying: ‘It’s funny you ask that. This is pure coincidence but my mother has had this and she sent it to me about six months ago. It’s a letter from you, Holly, to me.’

It was now a mortified Holly’s turn to reminisce, and the Celebrity Bear Hunt presenter was forced to read the cringe-worthy note aloud to the audience.

She began: ‘Dear Oliver, how are you, can you please send me a photo of…’

The letter briefly tailed off at this point, a fact which was not lost on host Michael.

It then continued: ‘Have a good time on holiday and get brown (if you can).

‘I love you, hope you love me and what about that photo of the nak3d lady Hannah was telling me about. Love Holly.’

As she read the final line, the TV personality burst out laughing before adding: ‘It looks like I’ve wiped my mouth with it [the note].’

Holly tied the knot with television producer Dan Baldwin in 2007, three years after they began dating.

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Holly tied the knot with television producer Dan Baldwin in 2007, three years after the pair began dating

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During his appearance on the show, Olivier proudly read out the childhood love letter that Holly sent him

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As she read the final line, the TV personality burst out laughing before adding: ‘It looks like I’ve wiped my mouth with it [the note]’

They share three children, including eldest son Harry who was born in May 2009 and eldest daughter Belle who arrived in April 2011.

Three and a half years later, second son Chester made it a trio.

The throwback comes after Holly’s sister Kelly, 47, honoured her 44th birthday with a sweet snap from their childhood.

Her sibling posted the picture of herself and Holly as children, with her arms wrapped around her sister as they posed on a tree trunk together.

Alongside the photo, she added: ‘Happy birthday little sister. I’ve got you always.’

Holly revealed she was celebrating her day with a pub lunch, as she posted a picture of her pie, mash and gravy alongside a glass of red wine.

Clearly happy with herself, Holly wrote: ‘Happy birthday to me…[heart].’

Young Holly was wearing a frilly white blouse with jeans, while her trademark blonde locks were a notably darker shade.

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The throwback comes after Holly’s sister Kelly, 47, honoured her 44th birthday with a sweet snap from their childhood

Meanwhile, Kelly was rocking a double denim look and her dark tresses were pushed back with a hair band.

On Thursday it was reported that Holly is facing a fresh court battle as her media company is dragged to court over an outstanding tax bill.

It was previously revealed by the Daily Mail that the company owned by the TV presenter owed £330,000 in corporation tax.

Roxy Media was set up by Holly and her producer husband Dan and has now been slapped with a winding up order.

This means that the business has been unable to pay off its debts, but the amount owed currently is not known.

The petition was to due be heard on Wednesday in the Insolvency and Companies Court in central London.

However, the Sun reports that Judge Sally Barber accepted an adjournment until April.