Holly Willoughby shares embarrassing moment her dress split open at Downing Street

Gemma Strong

Holly Willoughby was left red faced after suffering a monumental wardrobe malfunction while attending a charity event at Downing Street. The This Morning star told viewers that the zip on her dress completely split during a visit to the Prime Minister's residence, and revealed she was left stranded in the ladies until someone came to rescue her.

Holly Willoughby shocked co-host Phillip Schofield as she revealed her wardrobe mishap

"As soon as we walked through that lovely famous black door, I gave my coat and you have to give your phone in - because you're not allowed to have your phone - and we went up the grand staircase with all the Prime Minister's pictures and Dan [her husband] needed the loo, so I said, 'OK, I'll go to the loo too'," Holly explained during Wednesday's show.

"I went to the loo, stood up, and then I heard this noise - my zip on the back of my dress went completely!"

She continued: "Now, this isn't just a little zip, this zip goes from top to bottom! So I am now stood there with no coat, no phone, in the toilet in Downing Street, on my own thinking, 'What do I do? I can't walk out - my bum is out!'

Holly was left stranded after the zip on her dress completely broke

"I had to wait for somebody to come in to say, 'Please can you go and find my husband', and this lovely lady came in, and I went, 'Please can you find my husband, I think he's outside the men's loos waiting for me'," Holly said.

"Dan went downstairs and thought this was hilarious and told the majority of people he met along the way, including all the staff who recommended I use gaffer tape to strap my dress up! And I had to walk around in my coat all night."

Holly then had to explain her mishap to her host Samantha Cameron. "I did tell her because we had a photo together and I said 'I'm really sorry I'm wearing my coat' - everybody was wearing normal clothes and I'm wearing a great big winter coat - and I was like 'I'm so sorry but the zip on my dress has gone' and she just went 'Oh gosh!'," she revealed.

Oops...Why does this always happen to me and at No 10 too! 🍑🙈😳 #zipfail #mostembarressingmoment ...

A photo posted by Holly Willoughby (@hollywilloughby) on

The star uploaded a photo for her fans on Instagram

Shortly after attending the event – held in aid of children's charity Together for Short Lives - Holly shared the photo of her dress on Instagram, writing: "Oops...Why does this always happen to me and at No 10 too! #zipfail#mostembarrassingmoment."

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