Pippa Middleton arrives for dress fitting as details about highly anticipated gown surface

As word spreads that Pippa Middleton is expecting her guests to have not one, but two, outfits prepared for her wedding day, Duchess Kate's sister is getting her own highly anticipated ensemble in order.

The 33 year old was spotted arriving for a dress fitting in West London Friday in leather pants, a light blouse and a tan jacket -- and she wasn't the only one photographed. A woman holding a garment bag was also close behind, and if you ask us, the bag looks rather large. Could that mean we're in for a ball gown-styled dress? See the pics here.

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Well, according to E! News, a source close to Pippa's rumored dress designer, Giles Deacon, calls the design "very simple, elegant" and "all handmade." It's reportedly been taken in five times over the past six months due to Pippa's weight loss.

Rumors began swirling about Deacon's involvement back in December, when he was spotted visiting the bride-to-be and her mother with a garment bag in tow. However, the designer wouldn't confirm or deny the rumor when asked about it in April.

Scroll through to see how much each part of Pippa's weddings is expected to cost: