Duchess Catherine and Pippa Middleton

Duchess Catherine and Pippa Middleton

Britain's Duchess Catherine and Pippa Middleton will serve Prince Harry-themed cocktails at his 30th birthday party.

The sisters, who along with the flame-haired royal's close pal Guy Pelly are organising an exclusive party for his upcoming 30th birthday on September 15, are planning to mix up some unique beverages on the night.

The potent cocktails will include one named 'MacDonald Windsors' - which is made from gin, blue curacao and cranberry juice - and another appropriately titled 'King's Ginger Cocktail', which is made using macerated root-ginger liqueur with a twist of lemon.

A friend of the prince told Royal Watch: "Harry will want a big party, so the drinks will be flowing."

Catherine, 32, and Pippa, 30, have reportedly organised a birthday meal for Harry and 30 of his closest friends and family, where they will serve his favourite dishes of Beef Wellington and Fish Pie with Eton Mess for dessert.

The party will then move to one of the function rooms in Duchess Catherine and her husband Prince William's Kensington Palace apartment in London - which will be transformed into a nightclub - where more guests will arrive to sip on cocktails and party the night away.

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