Prince William is to visit Dusseldorf in Germany on August 23.
Prince William
The 34-year-old royal's engagement sees him attend several events is to mark 70 years of the state of North Rhine-Westphalia.
The Twitter page for Kensington Palace confirmed: "The Duke will visit Dusseldorf on 23 August to celebrate 70 years of the state of North Rhine-Westphalia #70JahreNRW (sic)"
Whilst on his trip, William - who has three-year-old Prince George and Princess Charlotte, 15-months, with his wife the Duchess of Cambridge - will honour the work of the British Forces Germany and their strong bond with Britain.
The palace added: "During the visit, HRH will attend events honouring the role of the British Forces Germany, and the strong ties between NRW and Britain(sic)."
William has not long returned from holiday with the Duchess Catherine, also 34, and his two children.
The trip to Dusseldorf comes before the Duke and Duchess of Cambridge's planned trip to Canada in September.
The couple are to visit British Columbia and Yukon after being invited by the Canadian Prime Minister Justin Trudeau.
A statement from Kensington Palace read: "Their Royal Highnesses have been invited to visit by the Government of Canada.
"They will visit British Columbia and the territory of Yukon as part of their tour.
"The Duke and Duchess are delighted to be returning to Canada.
"They hold very happy memories from their visit in 2011 - their first overseas tour as a married couple.
They are really looking forward to seeing other parts of this beautiful country and having the opportunity to meet many more Canadians along the way."
And the Governor General of Canada, David Johnston and his wife Sharon are thrilled to have them stay.
He said: "Sharon and I will be delighted to welcome Their Royal Highnesses The Duke and Duchess of Cambridge to Canada.
Their Royal Tour will take them to the beautiful province of British Columbia and the scenic territory of Yukon. Once again, our true Canadian pride and spirit will shine and be at the very heart of this visit so they can feel at home."
It's not yet sure if Prince George and Princess Charlotte will come with them.
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