Prince William and Kate Middleton's son turned another year older on Saturday.
The royals visited a cancer research institute and even made the traditional German pretzels and candies.
Prince George is already taking on royal duties, including traveling the world with mom, dad and sister Charlotte.
Her brother, Prince George, sleepily rubbed his face as the family tackled a new country.
The Royals had an eventful first day their official tour of Poland and Germany on Monday.
Cute kids alert! Prince George and Princess Charlotte rock the cutest outfits as their parents touched down in Poland.
The royal indicated she's open to expanding her family while out and about in Poland.
The family will be traveling to cities in Poland and Germany over the next five days.
Kate Middleton, Princess Charlotte and Prince George also attended the private memorial service on Saturday in England.
The newly married 33-year-old was photographed in London on Tuesday after her month-long getaway with her new husband, James Matthews.
Plus, see how Prince George stole the show at Queen Elizabeth's annual birthday event!
The 3-year-old royal looks just like his father Prince William and we can't get enough!
Pippa married James Matthews in Englefield, England, on Saturday, six years after Kate tied the knot with Prince William.
The 3-year-old royal flashed a mischievous smile after serving as a pageboy.
