Sister to the Duchess of Cambridge Kate Middleton, Pippa Middleton is officially Vanity Fair's newest contributing editor.

Britain's Prince William's 29-year-old sister-in-law will write a series of columns for the magazine, including a personal guide for Wimbledon spectators this summer.

"I first went to Wimbledon when I was eight years old and already a very keen tennis player," Middleton wrote in the magazine's July 2013 issue, her first article as a contributing editor. "During this first trip I acted on my childish tennis dreams and bought myself a postcard of the women's championship trophy, on which I wrote, 'I will win this one day,' with my signature below."

Middleton is facing criticisms about the magazine's decision to employee her and is too familiar with harsh comments from journalists.  According to reports, Middleton and her family, "who don't come from aristocratic stock, are frequently accused of 'social climbing' in the British press." 

Critics have also slammed her book "Celebrate: A Year of Festivities for Families and Friends." 

She defended her book in an article published in the Spectator, a British weekly publication.

"I have been much teased for my book, 'Celebrate.' Lots of journalists are saying that my advice is glaringly obvious," Middleton wrote in her article. "It's all good fun, I know, and I realize that authors ought to take criticism on the chin. But in my defense, let me say this: 'Celebrate' is meant to be a guide to party planning and, as such, it has to cover the basics. If I were to write a cookery book, for instance, I would be compelled to say that, to make an omelet, you have to break at least one egg."

Vanity Fair is excited to have Middleton on their staff.

"We're delighted to have Pippa as a contributor to Vanity Fair," told the magazine's editor Graydon Carter to the Los Angeles Times. "She's a keen observer of classic British pastimes. She is also an avid sportswoman, and we look forward to her take on traditional English pursuits, beginning with Wimbledon."