The royal couple and their children will be welcomed first in Warsaw by President Andrzej Duda.
The surroundings of Warsaw Chopin Airport may have been odd for George along with the unknown faces of dignitaries and soldiers in the guard of honour waiting on the runway.
"I am so happy that I saw this lovely couple", said Helena Wozna, 63, who was in the crowd.
Even with their solemn expressions, Kate Middleton and Prince William's children completely stole the hearts of everyone who saw them.
But all eyes will be on the couple's children, George aged three and two-year-old Charlotte, who are getting used to travelling overseas having joined their parents in Canada past year for an official trip. He also delivered a brief speech during the reception, which was held in Lazienki Park in honor of the 91-year-old queen.More news: Fuel prices in North Korea surge after China cuts oil sales
While Ms. Coad may be a resolute Republican, recent polling shows she's out of step with the vast majority of her countrymen: A little more than three-fourth of Britons favor keeping the monarchy and some 79 percent approve of William's handling of his royal duties, the Express newspaper reported in May 2016.
On their first official visit to Poland, William and Kate were accompanied by their children, Prince George, who turn 4 Saturday, and Princess Charlotte, 2.
The British charm offensive across Europe has begun! They also will pay their respects at Berlin's Holocaust Memorial.
Fashion-wise, Kate chose to wear a pristine white peplum coat by one of her favourite designers, Alexander McQueen as she touched down in the rain via private jet in Warsaw airport.
While in Poland, the couple will tour the former Stutthof concentration camp where 65,000 people were killed.
On Thursday, they head to Berlin.