Middleton's, nephew, Prince George, and niece, Princess Charlotte, will each play a role in their aunt's wedding to financier James Matthews. "You never know at that age".
A regular royal box guest at the Wimbledon tennis championships, Middleton remained visible on the social circuit.
Well, their wait is finally over. A bagpiper will be in attendance, and rumor has it that James will be incorporating tartan somewhere on his wedding outfit (though verdict's still out on whether he'll show up in a kilt).
The ceremony is taking place at the picturesque St Mark's Church in Berkshire, near where the Middleton girls grew up.
Ahead of the nuptials, workmen have been spotted working around the clock to prepare the church for the big day, with crews relentlessly mowing lawns and sprucing up the 12th century building in preparation. According to reports, the chapel holds 150 people but the entire building could hold up to 350.
Pippa's parents, Carole and Michael Middleton were pictured arriving at the church alongside the bride's younger brother James, with the group sheltering under umbrellas as they made their way inside.
Pippa, 33, is set to tie the knot with hedge fund boss James Matthews at the small Grade I-listed country church on Saturday. James Matthews is also an ultra-marathon runner, who was also a racing driver in his youth.
The pair met on the island of St Barts in 2012 and dated briefly before going their separate ways. The site reports that for five days a week, Pippa has been focusing on cardio and Pilates, and "she hasn't even had a glass of wine in months".
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After they dated for a year, Mr Matthews proposed on a romantic walk with a diamond the size of the Isle of Man.
Earlier this week it was reported that Prince Harry's girlfriend Meghan Markle had landed in the United Kingdom to attend Pippa's wedding.
Escorting Markle to such a high-profile event would be seen as confirmation that the relationship is increasingly serious. He also penned a book about his sexploits and has reportedly beaten a steroid addiction.
Pippa would later see the amusing side when writing about another celebrity with a celebrated behind, USA reality TV star Kim Kardashian.
A time when Pippa Middleton's butt was all anyone could talk about.
It was originally suggested that Meghan would be attending the reception only, as Pippa had supposedly told guests of a "no ring no bring" rule. Photo: Ray Tamarra What is the bride wearing?
As a result, this means Pippa will take on the title of Lady Glen Affric one day, which can apparently be used in the Commonwealth. Other designers in the frame include Amanda Wakeley.
It has been claimed the wedding has cost more than £300,000. Click through the picture gallery of celebrity weddings above to find out! According to BBC Weather, Saturday will start dry, before "sunshine and showers, some heavy and thundery with hail".
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