01of 12Chris Jackson/GettyKensington Palace celebratedPrince George’s fourth birthday on July 22, 2017, with a new set of adorable official portraits.
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Chris Jackson/Getty

Kensington Palace celebratedPrince George’s fourth birthday on July 22, 2017, with a new set of adorable official portraits.
02of 12Chris Jackson/Getty ImagesLess than a week before his fourth birthday, Prince George left for afive-day royal tour of Poland and Germanywith his parents,Prince WilliamandKate Middleton, and his sister,Princess Charlotte.
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Chris Jackson/Getty Images

Less than a week before his fourth birthday, Prince George left for afive-day royal tour of Poland and Germanywith his parents,Prince WilliamandKate Middleton, and his sister,Princess Charlotte.
03of 12Samir Hussein/WireImageThey started their visit on July 17, 2017, with two days in Poland before heading to Berlin.
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Samir Hussein/WireImage

They started their visit on July 17, 2017, with two days in Poland before heading to Berlin.
04of 12Samir Hussein/WireImageAt the Hamburg airport, George got to check out the inside of a helicopter, creating one of his most memorable photos.The royal family headed hometo London on July 21, 2017, a day before George’s fourth birthday.
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At the Hamburg airport, George got to check out the inside of a helicopter, creating one of his most memorable photos.The royal family headed hometo London on July 21, 2017, a day before George’s fourth birthday.
05of 12Richard Pohle/The Times/PA WireIn the fall of 2017,Prince Georgestarted a new school, Thomas’s Battersea, andwalked there on his first day with his dad. (Princess Kate was home with morning sickness.)
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Richard Pohle/The Times/PA Wire

In the fall of 2017,Prince Georgestarted a new school, Thomas’s Battersea, andwalked there on his first day with his dad. (Princess Kate was home with morning sickness.)
06of 12Chris Jackson/GettyPrince George’s new school isthe “best that money can buy"in London. Before Thomas’s Battersea,he attended Westacre Montessori Schoolnear the royal family’s country home in Norfolk.
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Prince George’s new school isthe “best that money can buy"in London. Before Thomas’s Battersea,he attended Westacre Montessori Schoolnear the royal family’s country home in Norfolk.
07of 12Kirsty O’Connor/PA WirePerhaps the biggest moment for Prince George in his fourth year was becoming a big brother for the second time. He’s more likely to remembermeeting Prince Louisas he wasn’t even 2 when Charlotte was born in May 2015.
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Kirsty O’Connor/PA Wire

Perhaps the biggest moment for Prince George in his fourth year was becoming a big brother for the second time. He’s more likely to remembermeeting Prince Louisas he wasn’t even 2 when Charlotte was born in May 2015.
08of 12Brian Lawless/GettyPrince George also got to wear pants— publicly for the first time! — as a page boy at theroyal weddingof his unclePrince HarryandMeghan Markle.
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Brian Lawless/Getty

Prince George also got to wear pants— publicly for the first time! — as a page boy at theroyal weddingof his unclePrince HarryandMeghan Markle.
09of 12Chris Jackson/Getty ImagesAnother memorable moment forPrince Georgethis year wasTrooping the Colour, when his cousin Savannah Philips, the granddaughter ofPrincess Anne,covered his mouth and shushed him.
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Another memorable moment forPrince Georgethis year wasTrooping the Colour, when his cousin Savannah Philips, the granddaughter ofPrincess Anne,covered his mouth and shushed him.
10of 12Savannah Phillips and Prince George.Karwai Tang/WireImageThe next day, on the sidelines ofPrince William’s charity polo match, Savannah pushedPrince Georgedown a hill after he tried to sit next to her. But for George, it was stilla good day packed with playing with his slinky and running around with Charlotte.
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Savannah Phillips and Prince George.Karwai Tang/WireImage

The next day, on the sidelines ofPrince William’s charity polo match, Savannah pushedPrince Georgedown a hill after he tried to sit next to her. But for George, it was stilla good day packed with playing with his slinky and running around with Charlotte.
11of 12PA Images/SipaPrince George also got to be front and center when all five members of his familymade their debut as a group at Prince Louis’s christeningon July 9, 2018.
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PA Images/Sipa

Prince George also got to be front and center when all five members of his familymade their debut as a group at Prince Louis’s christeningon July 9, 2018.
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Matt Holyoak/Camera Press/REDUX

source: people.com