Princess Charlotte and Prince Louis love to do royal wave like their dad Prince William.

Prince William and Kate Middleton’s youngest son, Prince Louis, made his balcony debut at the last Trooping the Colour. A clip of Princess Charlotte and Prince Louis during the said event before they graced the balcony was shared on Instagram.

In the video, Princess Charlotte and Prince Louis are looking through the window and they are waving the entire time. Prince Louis is so energetic that he waves so fast.

A number of netizens found the clip “cute” and “adorable.” Another said that it was so “sweet.” Meanwhile, a different netizen opined that Princess Charlotte was teaching her younger brother how to wave.

"Charlotte teaching Louis how to wave. Charlotte is an expert waver,” the netizen wrote.

Princess Charlotte and Prince Louis seemed to inherit their love for waving from their dad, Prince William. In another clip shared on social media, the Duke of Cambridge, Prince Harry and Princess Diana visited Sarah Ferguson after delivering Princess Beatrice.

In the short clip, the three royals are welcomed by Prince Andrew. Prince William and Prince Harry greet their uncle with a kiss, then the third-in-line to the throne starts waving to the crowd.

Prince William keeps on waving his hand before entering the facility. When they go out and walk their way to their car, Prince William is still seen frantically waving his hand even if they are already about to enter the car. Princess Diana decides to force Prince William’s hand inside the vehicle because the future king couldn’t stop waving.

In related news, there are rumors that the Duke and Duchess of Cambridge are expecting their fourth baby. Middleton was reportedly broody in her recent engagements and many took it as a sign that she wanted another baby after Prince Louis.

Bookies have dramatically slashed the odds of Middleton giving birth in 2020 to 1/2. They also put the chances of Prince Harry and Meghan Markle giving Archie a sibling on the same year at 4/7.

Kate Middleton, Prince Louis, Prince George, Prince William and Princess Charlotte
Kate Middleton carrying Prince Louis, Prince George, Prince William and Princess Charlotte after Prince Louis’ christening service at the Chapel Royal at St. James’s Palace in London on July 8, 2018. Getty Images/Dominic Lipinski