With the unstoppable rise of internet shopping, the occasional misguided purchase has become a fact of life.

But these women have been left fuming after being duped into buying dresses that looked nothing like the ones that were advertised online. 

Posted on the Facebook page Knock off Nightmares, hundreds of disgruntled shoppers have shared snaps of summer dresses, prom outfits and even bridal frocks that looked nothing like the items they saw online.

Some were lured in by low prices, while others thought they were getting on the real deal - until they tried on these frocky horrors.

A warning on the Facebook group, which has some 110,000 followers, reads: 'The point of this page is to inform girls of what may be delivered if they order from a knock-off site. 

'You can buy sale dresses from various sources, you can buy second hand, or you can support your local bridal store. 

'The choice is entirely yours. Just remember if it looks too good to be true, generally it is.'

The page owner adds: 'Please know, there are no online sites that show stock designer photos at a fraction of the real price that we ever would recommend.

'Weddings are a magical time so don't let it be ruined by a nightmare dress.'