This is William and Kate's first official joint trip to Poland and Germany; the Duke, also 35, made an official visit to Germany last summer.
The beginning of any royal tour is always marked by the striking photos of the family disembarking from a plane, and, this time, we were greeted with all four royals making their way off the jet. George and Charlotte will be seen on a number of occasions, most likely as they arrive and depart from both countries, while William and Kate will have jam-packed days scheduled.
Later today, the Royal family is set to visit the Warsaw Rising Museum, as well as the Heart in the Warsaw Spire building where they will see the city's panoramic views.
William and Kate will start their visit with a stroll along Warsaw's iconic Krakowskie Przedmieście street after meeting President Andrzej Duda and the First Lady.
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While in Poland, the couple will tour the former Stutthof concentration camp where 65,000 people were killed.
Also on Tuesday, they will visit a museum in Gdansk commemorating the Solidarity movement which shook communist rule in the 1980s.
On Monday, the Duke and Duchess of Cambridge and their two kids, Prince George and Princess Charlotte, arrived at Warsaw Airport looking picture ideal.
In Heidelberg, twinned with Cambridge, they will take part - in separate boats - in a race as cox to opposing rowing teams in the race with crews from Cambridge and Heidelberg.
The Royals have officially kicked off their five-day tour of Poland and Germany.
Our monarchy has close ties with Germany as a succession of sovereigns including George I - born in what has become modern German - were rulers of Hanover.
Many are viewing the royal trip, taken at the request of the Foreign and Commonwealth Office, as another Brexit diplomacy tour, helping to maintain and strengthen the UK's relations with Europe as it leaves the EU.