When it comes to weddings, it's not only the bride and groom who have to stress over their outfits.

The guests have to make sure their dresses look nice for pictures, but also don't detract from the bride's gown.

And aside from the obvious rule of not wearing white or ivory to the ceremony, they also need to consider just how revealing their outfits may be.

One woman recently discovered where the line gets drawn after sharing a photo of a possible dress for a wedding on social media and it's fair to say, it didn't go down well.

But one woman came very close to upstaging the happy couple (stock photo)

In a post on Facebook , a woman asked her friends if a black bodycon dress, with the sides exposed, would be "too much for a wedding".

She wrote: "Have to attend a wedding in about three weeks. I own this dress and I've never worn it yet.

"Is it too much for a wedding? Or is it possibly appropriate?"

Her photo was later shared in a Wedding Shaming group and the negative responses quickly flooded in.

People on Facebook were appalled by the dress

Many horrified users told the woman it was "inappropriate" for the intended event.

One person replied: "Not at all appropriate for a wedding."

Another said: "That dress is just not for a wedding. If you can pull it off, that's great for you, just don't wear it to a wedding."

While a third person was concerned it would upstage the bride as it was "too much".

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And she's not the only guest that's been slammed on Facebook for messing with a wedding.

One rude couple recently tried to take advantage of their invite to a ceremony and reception, by adding eight other people on to their RSVP.

In a blank space on the card, they wrote out the names of the family members who would be joining them, and even added that there may be a few extra people who hadn't yet confirmed.

A copy of the RSVP was shared on social media, where people were understandably outraged, with one person commenting: "I'd lose my s***. It's a wedding not a barbecue."