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Kate Middleton And Prince William Party In London Bar For Friend's Birthday

14/08/2014 16:40 | Updated 20 May 2015

Kate Middleton and Prince William, the Duke and Duchess of Cambridge, may be busy getting ready to tour Australia and New Zealand in April - but that didn't stop them from making an appearance at close friend's birthday bash at the weekend.

The royal couple made for Bunga Bunga in Battersea to celebrate Louise Aubrey-Fletcher's birthday, FYI she is the wife of Harry Aubrey-Fletcher who is pals with Wills from way back when.

BURTON, UNITED KINGDOM - JANUARY 13:  Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the official launch of The Football Association's National Football Centre at St George's Park on October 9, 2012 in Burton, England.  (Photo by Mark Cuthbert/UK Press via Getty Images)

Prince George's godmother and former classmate of Kate's, Emilia Jardine-Paterson d'Erlanger, was also partying with the royals at the restaurant. Yes, there were police protection officers on standby but this is proof Kate and Wills really do let their hair down.

Babysitter? Check. Low-key casual ensemble? Check. Kate opted for a black mid-length coat tied at the waist, pretty print dress and black ankle boots. See the look here.

Imagine being a guest at this swanky gathering and bumping into THE Duchess of Cambridge. Not just your average Saturday night - oh to have royal connections.

LOVE THE ROYAL FAMILY? Take a look through this amazing gallery of them on duty...

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