Prince William and Kate landed in Caen airport late in the afternoon as they visited Normandy for several engagements honouring the milestone event.
Upon their arrival in the coastal area of northern France, the Duke and Duchess headed to a veteran's tea party in the town of Arromanches.
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The Duchess, née Kate Middleton, was dressed respectfully in a blue Alexander McQueen coat she previously wore during her tour of New Zealand and Australia. Wearing her long brunette hair down, Kate accesorised her outfit with a black hat, heels and a clutch bag, while William chose a smart navy suit.
The royal couple spoke intently to veterans who had made the trip to Normandy in a Union Jack adorned marquee.
Meeting the veterans was a special moment for Kate as her grandfather Peter Middleton was an RAF fighter pilot who flew Mosquito warplanes that helped divert deadly doodlebug' bombs away from London.
After the tea party William and Kate attended the commemoration of the 70th anniversary of the Normandy Landings at Gold Beach.
Earlier in the day the Queen, Prince Philip, Prince Charles and the Duchess of Cornwall represented Britain at a commemoration ceremony at Sword Beach in Ouistreham.
Making up the blue-blooded crowd on the historic beach were King Willem-Alexander and Queen Maxima of the Netherlands, King Philippe and Queen Mathilde of Belgium and Prince Albert of Monaco.