Princess Charlotte is following in her mother's footsteps in more than one way, with her secret talent of dancing making the list.
The young royal copied the dance style from her mum, Kate Middleton, who also mastered the skill, says Prince William.
The future king explained the sweet revelation as he chatted to a group of schoolchildren for his ITV Documentary, A Planet For Us All.
He surprised the school kids after they built a bug hotel called Buckhingham Palace, to raise awareness of the importance of insects and the environment.
But during the chat with the prince, William answered questions about his own children, writes the Express.
One child asked the Duke of Cambridge if his eldest son Prince George, 7, had taught the rest of the family how to do the floss dance.
William replied his daughter Charlotte, 5, had learnt the popular dance style when she was only four after her mum, Kate, mastered the skill.
He said: "No, Charlotte can floss.
"Catherine can floss, but I can't. It's, it's like a really horrible film to watch me floss."
Another child asked: "Is Princess Charlotte cheekier than Prince George?"
However, William said: "No, they're about as cheeky as each other.
"They're very cheeky."
In the documentary, the Duke said young people should have help to get their "voices heard".
He added: "That generational gap has to be bridged somehow.
"I feel it is my duty and our collective responsibility to leave our planet in a stronger position for our children."
Kate Middleton and Prince William are spending more time with their children while the UK continues to fight Covid-19 in the third national lockdown.
William and Kate are said to be homeschooling George and Charlotte due to their London schools being shut in the pandemic.
The family still managed to celebrate the Duchess of Cambridge's 39th birthday recently, despite the coronavirus restrictions.
They were reported to have thrown a tea party at their country home, Anmer Hall in Norfolk, to celebrate the mum-of-three's love of tea.
A source close to the royals told People explained: "If you go round to her house, you get a cup of tea, and it's often William who makes it!
"It's a lovely, welcoming house, not a fancy, stuffy palace in any way.
“It’s a normal, busy family home with kids running around and knocking things over. There’s no airs and graces.”