Princess Beatrice quite literally let her hair down at the the Adventure in Wonderland Ball hosted by The Reuben Foundation in aid of Great Ormond Street Hospital Children's Charity.
The young royal, who is looking more and more like her mother Sarah Ferguson every day, was prim and proper in a blue check mini, silk blouse and sparkling hairband until she found herself being flung around the dance floor by a fellow party guest.
Princess Bea seemed to be having a whale of a time, and even lost her hairband in the madness of it all. Oh, rather!
Beatrice's appearance came after she touched back down on British soil after paying a visit to Richard Branson's private Caribbean island.
The 25-year-old shocked us all when she allegedly flew economy class back to Blighty, and we realised royals are real people too. Well, kind of.