A mother-of-the-groom sparked outrage as she wore an 'off-white' dress to her son's wedding.

The mum's floor-length gown was chiffon, tiered and teamed with heels which made her "drastically taller than the bride".

A picture of the happy couple with the groom's mum was posted on reddit - and social media users were not impressed.

Many said if someone had turned up to their wedding in a white dress, they'd have asked them to leave.

One said it looked like a double wedding , while another accused the mum of trying to 'grab attention'.

The debate online began after a wedding guest posted an image with the caption: "Mother of the groom wore an off-white chiffon dress and heels that made her drastically taller (she's only slightly taller than the bride IRL [in real life])."

The mother-of-the-groom (centre) in an off white dress

Joining in the conversation, one Reddit user said: "I don't care who they are but if someone turned up to my wedding wearing a white dress I'd ask them to leave.

"Especially if they took it as far as this woman did."

Another agreed, commenting: "I'd ask them to leave as well."

One revealed what they would have done in the same position, saying: "As a married woman, I can understand someone not wanting conflict or starting off a mother in law and daughter relationship off on a bad note.

"But that sure would p*** me off and I’d be sour to her for the rest of her life.

"If it were me, I’d just tell the photographer to avoid taking any pictures of us together lol.(sic)."

Not everyone saw an issue with it however, with one commenting: "What’s the problem with wearing a white dress to a wedding? (I’m not married and haven’t been to a wedding in years so I’m not the most well informed)."

One Reddit user, explaining the etiquette, said: "Traditionally only the bride wears a white dress.

"It's considered rude to show up in a white dress because it looks like you are trying to steal attention away from the bride."