Pippa Middleton at Royal Wedding
Carrying Kate's train on 29 April 2011 threw Pippa's rear into the spotlightReuters

Pippa Middleton has revealed that her infamous bridesmaid's dress worn to the Duke and Duchess of Cambridge's wedding was meant to be "insignificant".

Her glamorous appearance at the April 2011 nupitals made the figure-hugging dress an overnight sensation, with her bottom grabbing headlines around the world.

The sister of Kate Middleton, who has not spoken publicly up until now, said the media furore caused by the gown "was completely unexpected".

"I think the plan was not really for it to be a significant dress. Really just to sort of blend in with the train," she said.

The ivory full-length dress was designed by Alexander McQueen creative director Sarah Burton and showcased her curvy figure. She quickly garnered legions of male admirers and a Facebook group was even set up in honour of her "Peachy rear".

The 30-year-old said the international attention her derriere received was "flattering" but also "embarrassing" and definitely was not planned.

With the media dubbing her the "world's most famous bridesmaid" and many accusing her of stealing her sister's thunder, it could have easily been an overwhelming occasion.

However, for Middleton, it was a family wedding like any other: "It sounds funny to say, but we saw it as just a family wedding. And actually I didn't realise perhaps the scale of it until afterwards."

Speaking of her future plans for the famous dress she said: "The dress is in my wardrobe at home. I haven't worn it since. I think I'll just keep it there. I'll bring it out if someone wants to see it, or if my children one day want to see it, but it's tucked away."