To officially kick off their summer tour of Poland and Germany, Prince William , Duchess of Cambridge Kate Middleton
and their famous tots, Prince George and Princess Charlotte
, officially touched down in Warsaw Monday. The trip marks the couple's first joint visit to the country. However, not even the 2-year-old is a stranger to the art of royal touring. While this trip is the third royal tour for her 3-year-old brother, Princess Charlotte
made her global debut in Canada in September 2016. However, the trip is the kids' first official time in Europe.