Break out the deviled eggs and champagne flutes: Pippa Middleton's book is officially here.

Well, just in the United Kingdom. Americans, you'll have to wait to get a peek at Celebrate: A Year of Festivities for Families and Friends, Middleton's buzzed-about party planning tome. To kick off her British launch on Thursday, the 28-year-old Brit suited up in not one, not two, but four different outfits for a day full of book festivities. (Her sister Kate skipped the party, as expected. *sad face*)

So how did Pippa cram four outfits into one day?

1. Pippa stops by Foyles Bookshop for her first book signing wearing a mod colorblocked dress of black, blue and neon yellow.

2. She then arrived at a Fulham book store in a plum-colored Roksanda Ilincic frock, where she posed for rather stiff portraits clutching her book.

3. She changed into a Markus Lupfer green and black brocade dress to play with kids and fend off awkward conversations. (One adorable little girl told her she "hates princesses,", which obviously got Pips a little flustered.)

4. Time for a paneled gray Stella McCartney frock for evening celebrations.

Phew, that must have been exhausting. Luckily going to parties is basically Pippa's job -- she's somewhat of an expert.

Check out the famous relative-of-a-royal below. Which dress was Pippa's best?

PHOTOS:

pippa middleton book

pippa middleton

pippa middleton

pippa middleton

See more Pippa fashion:

Loading Slideshow...
  • March 2006

  • June 2006

  • March 2007

  • May 2007

    (Getty photo)

  • July 2007

    (Getty photo)

  • June 2008

    (Getty photo)

  • July 2008

    (Getty photo)

  • September 2008

    (Getty photo)

  • September 2008

    (Getty photo)

  • June 2009

    (Getty photo)

  • October 2009

    (Getty photo)

  • December 2009

    (Getty photo)

  • January 2010

    (Getty photo)

  • February 2011

    (Getty photo)

  • April 2011

    (Getty photo)

  • April 2011

    (AP photo)

  • April 2011

    (Getty photos)

  • April 2011

    (Getty photo)

  • May 2011

    (FilmMagic photo)

  • May 2011

    (FilmMagic photo)

  • May 2011

    (FilmMagic photo)

  • May 2011

    (FilmMagic photo)

  • May 2011

    (Getty photo)

  • May 2011

    (Getty photo)

  • May 2011

    (Getty photo)

  • June 2011

    (FilmMagic photo)

  • June 2011

    (Getty photo)

  • June 2011

    (Getty photo)

  • June 2011

    (Getty photo)

  • June 2011

    (FilmMagic photo)

  • June 2011

    (Getty photo)

  • July 2011

    (Getty photo)

  • July 2011

    (FilmMagic Photo)

  • July 2011

    (FilmMagic photo)

  • August 2011

    (FilmMagic photo)

  • September 2011

    (Getty photo)

  • September 2011

    (Getty photo)

  • September 2011

    (FilmMagic photo)

  • September 2011

    (FilmMagic photo)

  • September 2011

    (FilmMagic photo)

  • September 2011

    (FilmMagic photo)

  • September 2011

    (FilmMagic photo)

  • October 2011

    (Getty photo)

  • October 2011

    (FilmMagic photo)

  • October 2011

    (FilmMagic photo)

  • October 2011

    (FilmMagic photo)

  • October 2011

    (WireImage photo)

  • October 2011

    (FilmMagic photo)

  • October 2011

    (FilmMagic photo)

  • October 2011

    (FilmMagic photo)

  • November 2011

    (Getty photo)

Want more? Be sure to check out HuffPost Style on Twitter, Facebook, Tumblr, Pinterest and Instagram at @HuffPostStyle.