Kate Middleton Pippa Middleton
Kate Middleton does not want Meghan Markle stealing the attention at Pippa Middleton's wedding Reuters

Kate Middleton is allegedly worried that Meghan Markle will grab everyone's attention at Pippa Middleton's wedding. The Duchess of Cambridge's younger sister and James Matthews who got engaged on 17 July, will tie the knot on 20 May 2017.

According to a report in Life & Style, Prince Harry and Markle will attend the event, and Kate is upset over the situation. A source said: "They're locked in a huge fight. Harry and Meghan want to use the wedding to make a really public declaration of their love, but Kate doesn't want Meghan overshadowing her sister at her own wedding."

"Harry may even announce an engagement to Meghan before the wedding. Then, when he brings her, there will be even more attention on [Markle]. Kate is furious!" the insider added.

Pippa and Matthews had first dated in 2012 but split the same year. In August 2015, the duo sparked rumours that they are dating again after he was spotted at Pippa's side during a Middleton family vacation at his parents' hotel. They have been together this time for less than a year.

Pippa shot to fame when she wore a tight-fitting dress at Kate and Prince William's fairy tale wedding in 2011. Pippa is hoping her wedding dress will outdo the dress she wore to her sister's wedding.

David Emanuel, who designed Princess Diana's wedding dress, suggested that Pippa should avoid a wedding dress like that worn by Kate. He told to Mail Online: "I personally, would put her in something very soft, perhaps chiffon, with a train of course because it's dramatic. Possibly a little lace bodice, soft and fluid, I mean she's got a great shape."

"And I would say the complete opposite of Kate just so she makes her own statement really. Soft and pretty," he added.