This year's Royal Variety Show performance was Kate Middleton and Prince William's first "date night" in a long time. Not seen on the star-studded occasion, however, were their three adorable children.

According to a report by Harpers Bazaar, the children were excited by the sound of a night of "singing and dancing" when Kate told them about the event before leaving Kensington Palace.

When the excited children asked if they could join their parents at the London Palladium, the mom-of-three was forced to use a phrase that is very popular with parents across the globe -- "Not on a school night!"

They may be royals, but they are raising their children similar to any other parents. They already have their hands full with three children, Prince George, Princess Charlotte and Prince Louis.

Royal Children Also Performers?

The comments came as the Duke and Duchess of Cambridge spoke to Petula and the rest of the cast of "Mary Poppins the Musical," whom they greeted at the event.

Petula also told Kate she should bring George, Charlotte and Louis to the show, to which Kate responded with, "They would love it," according to the Evening Express.

"Kate said that her children love performing at home, particularly Charlotte," Petula said, talking to The Daily Mail. "Kate also told us how lucky we were to be on stage in the West End and asked how we managed to do it with our schoolwork. I can't tell you how exciting it was to meet them."

Moreover, Kate spoke to six-year-old acrobat Aurelia George and told her that Princess Charlotte also likes to do gymnastics and has grown particularly fond of cartwheels and headstands.

It was reported that Princess Charlotte had developed a passion for watching ballet because, in 2018, she was spotted with her mother attending "The Nutcracker" performance at the Royal Opera House.

Prince George also has a 35-minute ballet class for his Year Three curriculum at Thomas's Battersea.

Early this September, Princess Charlotte has already joined her older brother Prince George at Thomas' Battersea School in South London.

Looking Glamorous!

At the Royal Variety Show, Kate Middleton upped the glamour stakes. She looked stunning in a custom floor-length black lace overlay Alexander McQueen gown, paired with black stiletto heels and loose curly hair.

Comedians Rob Beckett and Romesh Ranganathan were the hosts of the show. The comedy duo introduced the royal couple and joked that the royal couple was on a "date night" as the camera zoomed in on them, laughing and giggling in the Royal Box.

This is Kate and Prince William's third time attending the Royal Variety Performance. They have made an appearance in 2014 and 2017.

The event helps raise money for the Royal Variety Charity, formally known as "The Entertainment Artistes' Benevolent Fund," of which the Queen is Patron.

The money raised from the show will fun hundreds of entertainers throughout the United Kingdom who need help due to illness.

In 2018, Meghan Markle and Prince Harry represented the Royal family at the Royal Variety Performance, which featured the 2018 winner of Britain's Got Talent, Lost Voice Guy.

READ MORE: Meghan Markle Secret Bonding with Baby Archie REVEALED

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Royal uk, Royal family, Kate Middleton, Duchess of cambridge, Prince William, Princess Charlotte, Prince George, Prince Louis