The Best Pictures of Prince George and Princess Charlotte We've Been Blessed With This Year

The royal siblings couldn't have been cuter in their wedding finest at Pippa Middleton and James Matthews's nuptials in May.

Prince George just couldn't hide his exasperation after a long day at the Trooping the Colour in June.

To celebrate her second birthday in May, the royal family shared this sweet image of Princess Charlotte taken by her mother, the Duchess of Cambridge.

Princess Charlotte's sweet smile matched her mom's at the annual Trooping the Colour ceremony in June.

Who could resist that adorable dimple Prince George showed off as he arrived to Pippa Middleton's wedding in May?

Only Princess Charlotte could stick out her tongue and still look this cute.

Before heading out to the balcony of Buckingham Palace for the Trooping the Colour, Princess Charlotte and Princess George skeptically investigated the scene from a palace window.

Princess Charlotte served as one precious flower girl during her aunt Pippa's May wedding, and it looks like she took her duties very seriously.

Neither the prince or the princess could keep their eyes off the air show that took place during the Trooping the Colour celebration in July.

The little princess gave photographers one last glance before walking down the aisle at Pippa's wedding to James Matthews in May.

Prince George was back with another hilarious facial expression after attending his aunt Pippa's wedding as a page boy.

Prince George helped his little sister with her flower girl wreath as they prepped to walk down the aisle at Pippa's wedding.

Prince George and Princess Charlotte must have known the cameras were watching when they flashed these sweet expressions from the balcony of Buckingham Palace in June.

Princess Charlotte was the picture of a perfect flower girl at Pippa Middleton and James Matthews's May wedding.

Prince Charles looked adorable when he puffed up his cheeks on the first day of his five-day tour of Poland and Germany with his family in July.

Prince George was the cutest kid at Thomas's Battersea School in London on his first official day.

Duchess Kate and Princess Charlotte were a stylish mother-daughter duo during their royal tour this Summer.

Prince George handled his first day of school in September like a pro, but it was later revealed that the cute kid was already tired of going to school before the month ended.

Princess Charlotte literally stopped to smell the flowers while visiting Germany with her parents in July.

Prince George flashed his signature unimpressed face when he landed in Berlin to tour the city with his family.

Princess Charlotte had a heartbreaking little tantrum on the very last day of the royal family's tour, but she still managed to shake hands like the total trooper that she is.

Meanwhile, Charlotte's older brother looked delighted to be around helicopters again.

In July, Prince George broke protocol when he flew on a plane with his father, Prince William. According to the royal rules, the two direct heirs are prohibited from flying together in order to protect the lineage in case of an accident.

Prince George looked all grown up in an official portrait for his fourth birthday.