Prince William was quite a handful when he was much younger.

In an unearthed video, the future king looks adorable in his military uniform. Prince William is playing outdoors with Princess Diana and Prince Harry.

At one point, the dad of three decides to climb up the monkey bars. Princess Diana is standing close to her eldest son, but she couldn’t help but feel scared when Prince William suddenly slips.

Princess Diana places her hand over her chest and tells Prince William that what just happened scared her. However, Prince William seemed unfazed. He continued climbing the monkey bars with ease.

During the incident, the Princess of Wales is also carrying her youngest son, Prince Harry. The Duke of Sussex is also wearing his military uniform but he didn’t have a hat on. Prince Harry was still too young to climb the monkey bars that’s why Princess Diana just carried him.

Prince Harry is sucking his thumb in the video, and he was unable to get rid of this habit until he got a little older. In fact, Prince Louis is now being likened to his uncle because both royals love to suck their thumb.

In the same video, Princess Diana allowed Prince Harry to go down a small blue slide. In the clip, Meghan Markle’s husband was smiling from ear to ear but he seemed unsure if he wanted to slide down.

Princess Diana pushed her son a little bit so that Prince Harry could finally go down the slide. Prince William is seen waiting for Prince Harry at the bottom of the blue slide.

The Duke of Sussex seemed to have a blast but he didn’t want to go down the same path again. He ran away from his mom and Prince William and they didn’t follow him.

At one point, Prince William pushed Prince Harry on a swing. But when Princess Diana realized that he was pushing too hard, she intervened.

Prince William, Princess Diana, Prince Harry
Pictured: Princes William, Harry, Princess Diana is seen with floral tributes left outside Kensington Palace in Central London on August 29, 2017 ahead of the 20th anniversary of Princess Diana's death. Getty Images/Daniel Leal-Olivas/AFP