Prince Harry was first Royal to break the rules on palace balcony almost 30 years ago

At the Trooping the Colour celebration last Saturday, young Savannah Phillips caught people's attention when she covered Prince George's mouth.

Seven-year-old Savannah is not the first young royal to do such an act during the annual event that marks Queen Elizabeth II's birthday.

As reported by PEOPLE, Prince Harry did the same thing to his cousin, Princess Beatrice, when he was still five years old, and she, two. It occurred during the annual celebration in 1990.

Like Savannah, Prince Harry, who just recently tied the knot with American actress, Meghan Markle, covered his then little cousin's mouth in plain view of everyone.

Savannah's father is Queen Elizabeth's eldest grandchild, Peter Phillips. Everyone was amused to see putting her hand over the mouth of the four-year-old future king.

"Savannah pretended to conduct as the national anthem was playing, and George joined in the fun. But when Savannah realized it was probably not what they should be doing, she stopped George, 4, from saying any more," PEOPLE quoted a royal observer as saying.

Young royals often steal the show during major royal events. During Prince Harry and Meghan Markle's wedding last month, Princess Charlotte's playfulness attracted massive attention from the crowd and the media.

She endeared the public when she stuck her tongue out while inside the car as she arrived at St. George's Chapel, where the wedding took place.

Prince Harry, 33, is known for his less serious demeanor. Aside from putting his hand over his cousin Princess Beatrice's mouth during the Trooping the Colour celebration, Prince Harry also made a silly face out the car window after a visit to the hospital when Beatrice was born in 1988.

He pulled the same move again when he arrived at a school nativity play with his mother, Princess Diana. As an adult, Prince Harry's past mischiefs have also attracted media attention, include one in which he was photographed naked in a hotel in Las Vegas.

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