As far as wedding etiquette goes, most people know not to wear white to another person’s ceremony.
While some are relaxed about the fashion rule, it’s seen as a disrespectful move to many.
So when a woman admitted that a guest rocked up in the bridal shade, people were horrified.
So is there anything wrong with it?
The Mumsnet user wrote: “A guest’s plus one (someone I’d never met before) wore a white mini dress to my wedding.
“I laughed it off at the time (more focused on getting married!)
“But lots of people were a bit outraged on my behalf that she wore white.”
She then opened up the debate to others, asking: “Anyone got some more lovely tales of cheeky f****** trying to steal wedding thunder?”
Following the woman’s confession, many other Mumsnetters revealed that the same problems had arisen on their big days.
One said: “My best friend married a man with a step mother from hell.
“The step mother had shown us a nice, gold suit that she had planned to wear to the wedding – but actually showed up in a long, white gown not dissimilar to the bridal gown!
“We were shocked, but chose to ignore and not give her the attention she was seeking.”
Another recalled a similar experience, writing: “Went to a wedding recently where one woman wore a white trouser suit with a belly-baring white top.
“Add in lots of very attention-seeking behaviour, most of the guests thought she was a total fool.”
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Following these awkward confessions, many Mumsnet users slammed wedding guests who dare to don the bridal hue.
One commenter insisted that those who wear white: “want to offend or have a desperate need for attention.”
Another agreed: “White & black – definitely colours not to be worn to a wedding.”
A third added: “Yep, it’s that bad to wear white.”
Despite this, not all responders saw anything wrong with wearing white.
One asked: “Is it that bad to wear white? For someone who isn’t part of the bridal party?
“It wasn’t a white gown… some people are easily outraged.”
Another agreed: “I don’t get the drama about wearing white.
“I bet most of the men wore white shirts, is that wrong too?”