Prince George and Princess Charlotte's Best Pictures From 2016

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Prince George and Princess Charlotte are growing up right before our eyes. Just in this year alone, the two have already had some pretty big milestones. Not only did George attend his first day of preschool, but Charlotte also celebrated her first birthday and embarked on her first royal tour. As the royal family continues to release more and more pictures of the siblings, we decided to put all of their best moments from 2016 in one easy place. If that's not enough cuteness for you, be sure to check out Kate Middleton's sweetest mom moments and Prince William's best outings with his kids.

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The young royal began his first day of preschool at the Westacre Montessori School in Norfolk in January.

The siblings looked some much alike in the British royal family portraits for Queen Elizabeth II's 90th birthday in April.

Getty | The White House

Prince George adorably met President Barack Obama and First Lady Michelle Obama in his pajamas when the couple visited the royal family in April.

Getty | Max Mumby/Indigo

The royal siblings stole the spotlight at the Trooping the Colour parade in London in June.

Getty | Ben A. Pruchnie

The parade also marked Princess Charlotte's Buckingham Palace balcony debut.

Ranald Mackechnie | Royal Mail

Prince George put on his best smile when the Queen snapped a photo with her royal heirs during her 90th birthday celebration in April.

Getty | Samir Hussein

The little prince caught a helicopter ride with his parents back in April.

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The 3-year-old looked too precious for words in his birthday portraits in July.

Getty | Chris Jackson

They even enjoyed a sweet play date at the Government House in Victoria, British Columbia, during their visit.

Getty | Pool

The two were all smiles when they waved goodbye to Canada.

Getty | Samir Hussein

Prince George looked pretty upset about leaving as he smushed his face up against the plane window.

Getty | Pool/Sam Hussein

While Princess Charlotte took a moment to stop and smell the roses before boarding the plane.