The announcement of a French state visit suggests that the King is keeping up a full schedule, as he continues to receive treatment for cancer.
Last month, the King and Queen went to Italy on a state visit, drawing enthusiastic crowds in Rome and Ravenna, on a trip that coincided with their 20th wedding anniversary.
The royal visitors also had a private meeting at the Vatican with the late Pope Francis.
The King will also be going to Canada this month for the state opening of Parliament in Ottawa, the first time a monarch has attended in almost 50 years.
It will be seen as a show of support for Canadian independence, after calls by President Trump for Canada to become the US 51st state.
In a diplomatic balancing act, there is also an invitation for President Trump to make a second state visit to the UK, with President Trump recently suggesting that a visit could take place in September.
It is understood that the French visit was already being planned before the extra invitation was extended to President Trump, making this an increasingly busy year for international royal engagements.
The last state visit to the UK by a French president was in March 2008, when President Nicolas Sarkozy was a guest of Queen Elizabeth II.
