Prince George, Princess Charlotte frolic under Duchess Kate's watchful eye at Prince William's polo match: The cutest photos

Just one day after they stole the show on the balcony of London's Buckingham Palace at Britain's annual Trooping the Colour festivities in celebration of the queen's birthday, Prince George and Princess Charlotte headed to Gloucester, England, where dad Prince William competed in the Maserati Royal Charity Polo Trophy match at Beaufort Park on June 10, 2018. The little royals had a blast running, playing and frolicking in the grass on the grounds as their mom, Duchess Kate, kept watch. Keep reading to see all the best photos from their happy family outing…

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Duchess Kate cuddled with Princess Charlotte and Prince George during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018. Kate looked casual and cool in $53 summer dress from Zara and Russell & Bromley wedges, MailOnline reported.

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Prince George and Princess Charlotte had a blast running around on the grass during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018. (Their 6-week-old baby brother, Prince Louis, stayed home.)

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Princess Charlotte struck a sassy pose with sunglasses as she played in bare feet on the grass during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

Less than seven weeks after giving birth to son Prince Louis, Duchess Kate ran after Prince George and Princess Charlotte (in wedges!) during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

Princess Charlotte played in the grass on the polo grounds as her father, Prince William, played in the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

Duchess Kate and Princess Charlotte watched as Prince George played with a rainbow slinky during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

During a break from playing polo, Prince William chatted with wife Duchess Kate as son Prince George looked on during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

Duchess Kate cuddled with Prince George and Princess Charlotte during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

Duchess Kate enjoyed a day out with Prince George and Princess Charlotte — as well as royal family members Autumn Phillips and her daughters, Savannah and Isla — during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

Duchess Kate fussed over Princess Charlotte while spending time with Prince George and friends at the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

Duchess Kate cuddled with Princess Charlotte and Prince George during the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.

With his family nearby, Prince William, the Duke of Cambridge, looked sharp as he played in the Maserati Royal Charity Polo Trophy match at Beaufort Polo Club in Gloucester, England, on June 10, 2018.