UPDATE: Pippa has denied an engagement, the pair are just happily dating for now.

In the latest (very exciting!) Middleton news...

According to multiple U.K. news outlets, friends close to Pippa Middleton claim that she and boyfriend Nico Jackson are secretly engaged and set to marry in the spring. They've been dating for over six months and recently left on a two-week vacation together, likely to Mustique where the Middleton family often vacations. Friends of the couple claim that Nico popped the question shortly before this year's Wimbledon tournament.

Apparently, Pippa, 29, and her stockbroker boyfriend Nico, 35, are planning to announce their engagement after her 30th birthday next week and were waiting so as not to overshadow her sister's news. Sources say that the Middletons are thrilled for their youngest daughter, and that both families get along quite well.

Pippa became famous in 2011 as soon as she stepped out of the car as a bridesmaid in the Royal Wedding, being dubbed by many "her royal hotness." While the world remains enthralled with the Duchess of Cambridge, friends say Pippa is ready for her own "fairy tale wedding." If the rumors are true, we expect an exciting announcement following Pippa's birthday on September 6th. It's a good time to be a Middleton!

Click through the gallery to see Pippa's effortless style.