Prince William and his wife the Duchess of Cambridge, née Kate Middleton kicked off their week with a visit to Belgium on Monday morning.
William and Kate were greeted in royal style by Belgium's King Philippe and Queen Mathilde upon their arrival in Liege.
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Kate looked stunning in a cream coat dress with a pleated skirt and Peter Pan collar by Alexander McQueen. She accessorised with a matching hat with dusty pink roses by Jane Taylor, her trustee LK Bennett heels, clutch bag and a pair of pearl drop earrings.
Prince William, meanwhile, was handsome in a navy suit. He also wore the gold and silver Jubilee medals given to him by the Queen.
The royal couple are attending WWI commemorations, on what will be one of their last public appearances before taking a month-long summer holiday.
Next on Monday's agenda, the British royals met with French president François Hollande as they attended a ceremony at the Cointe Inter-allied memorial.
On arrival at the hill of Cointe, William laid a poppy wreath at the British memorial.
The British royal then made a powerful speech before more than 50 heads of state, in which he paid tribute to Belgium.
"Your Majesties, if I may say so, Belgium's steadfast remembrance of your war dead, and ours, is a great credit to your nation," he said.
"On behalf of Her Majesty Queen Elizabeth, head of the Commonwealth, thank you for the honour you do us all."
He went on to quote British nurse Edith Cavell, "who saved soldiers from each side. On the night before she faced a German firing squad, she said: 'I must have no hatred or bitterness towards anyone'".
Later in the afternoon, the royal couple will travel to Belgian city Mons, where they be joined by William's brother Prince Harry as they attend a reception at Mons Town Hall.
The trio will then attend a commemoration event at Saint Symphorien Military Cemetery.