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When Pippa Middleton steps out on her wedding day, the bride will not disappoint in the fashion department.

As the countdown continues for the romantic ceremony at St Mark's Church later this month, E! News is learning more about what Pippa could be wearing on her special day.

While the bride herself has not confirmed what and who she is wearing, a source close to Giles Deacon's team tells E! News that the design is "very simple, elegant and it's all handmade."

In fact, our source says "very few people have seen the finished thing."

Back in April, Giles was asked about possibly designing Pippa's dress. At the time, he didn't give away any hints or confirmation.

Pippa Middleton

PA Images/Sipa USA

"I can never really comment on rumors," he told HELLO! Fashion. "Until things are confirmed, it's just rumors."

Our source also adds that Pippa has had her dress taken in five times because she has lost some weight over the past six months.

Just a few weeks ago, Kate Middleton's sister was spotted at the exclusive fitness center and private club KX Gym in Chelsea. An eyewitness said she stayed for more than an hour for a Pilates class.

As the final touches are made to what is expected to be one unforgettable wedding, Pippa has brought in some assistance.

A separate source tells E! News that James Matthews' fiancée has hired a new assistant to help with wedding planning and projects in the future.

The new employee previously worked with Sienna Miller and Victoria Beckham proving they have plenty of experience collaborating with famous faces.