Prince George and Princess Charlotte will make another appearance during their parents' European tour when the Duke and Duchess of Cambridge travel to Germany.
William and Kate and their children will say goodbye to Poland, where they have spent the past two days celebrating the nation's history, culture and ties with the UK, and fly to Berlin.
When the Cambridges arrived in the Polish capital of Warsaw on Monday, George, who will turn four on Saturday, looked shy and reluctant to take part in the official welcome staged by the European nation.
So royal watchers will be eager to see if the future king is more at ease when his parents land in Berlin to start the second leg of their five day trip.
In Berlin William and Kate will hold a meeting with Chancellor Angela Merkel before visiting the Brandenburg Gate, the German capital's most famous landmark and a symbol of the country's unification.
The royal couple will say hello to the crowds gathered on Pariser Platz in front of the gate, before making their way to the Holocaust museum where they will tour the institution and the nearby Holocaust memorial.
Later in the day the Duke and Duchess will visit Strassenkinder in east Berlin, a charity which supports young people from disadvantaged backgrounds, including homeless children.
They will return to the west of the city and meet President Frank-Walter Steinmeier at the Bellevue Palace, and in the evening attend a Queen's birthday party held in the gardens of the British ambassador's residence.