Prince George, the eldest son of the Duke and Duchess of Cambridge, has become known for being quite the character, delivering numerous memeable moments in his five short years.
But one of his cutest moments so far was at his sister Princess Charlotte's christening in 2015, when he decided to have mini-breakdown, shortly before cheekily peeking into her pram while she slept behind Prince William and Kate's backs.
Why? Because he's the future King of Britain and he'll do whatever he pleases.
And it seems like the apple doesn't fall far from the tree.
His father Prince William and his grandfather Prince Charles both showed off their mischievous sides at their siblings' christenings down through the years too.
"It's my christening and I'll cry if I want to," seemed to be Prince William's motto during his baptism in 1982.
Poor Princess Diana looked as if she was about to cry too.
The third in line for the British throne also nearly broke the internet (Kim Kardashian West who?) when his elder, second cousin Savannah placed her hand over his mouth during the trooping of the colour last year.
And it's not just Prince George and Princess Charlotte who have minds of their own.
Their second cousin Mia Tindall, daughter of former English rugby player Mike Tindall and the Queen's granddaughter Zara Phillips, threw a royal strop when her mother wouldn't let her run off by herself at an English festival in 2015.
Even Zara, daughter of Princess Anne, who is known for being one of the most laidback members of the royal family, had trouble keeping her cool that day.
But it's not just the royal children who are prone to a royal telling off.
The Duke and Duchess of Sussex look tense in the exchange which a lip reader claims shows Harry telling his wife to "turn around".
The Duchess is seen turning back to speak to Harry which prompted Harry to respond with those brief words.