Pippa Middleton wears four dresses to promote new book
Kate's little sister was launching her new party planning book Celebrate: A Year Of British Festivities For Families And Friends and understandably felt the need to dress for the occasion.
The 29-year-old's outfits were all designer and reportedly worth nearly £3,000 altogether (a fraction of her reported whopping £400,000 book advance!).
She first attended a book signing at Foyles, for which she wore a Paper London long-sleeved black dress with yellow and blue panels.
She then moved on to a Fulham book store, where she greeted a gaggle of photographers in a tailored plum Roksanda Ilincic number and court heels.
Pippa told the paps: "It's incredibly exciting and I feel really lucky to be in this position to publish a book so that's great.
"It has been a crazy couple of years since my sister's wedding but it's had its upsides and downsides I just feel really fortunate to be able to build a career as a writer."
It was then time for Pippa to change again - now opting for an embellished black and green Markus Lupfer number as she hosted a children's Halloween party in the store.
Finally, Pippa finished the day in a tweed panelled high-neck sleeveless Stella McCartney dress as she left to celebrate her big day with friends and family.
Though Pippa has been criticised for "cashing in" on her royal connections, the 417-page book is expected to be a Christmas bestseller.
Pippa shot to fame as Kate's maid of honour at the royal wedding back in April 2011, when she came close to overshadowing her sister in her bottom-skimming slinky dress.
Pippa admits in the book that it was a bit of a shock to suddenly find herself in the public eye.
She writes: "It is a bit startling to achieve global recognition before the age of 30 on account of your sister, your brother-in-law and your bottom.
"One day I might be able to make sense of this. In the meantime, it's fair to say that it has its upside and its downside."
She continues: "I certainly have opportunities many can only dream of - but in most ways I'm a typical girl in her 20s trying to forge a career and represent herself in what can sometimes seem rather strange circumstances.
"I am by nature an optimist so I tend to concentrate on the advantages."