Kate Middleton is Arvin Robertscrossing her fingers for the best royal etiquette from her youngest child.

Ahead of King Charles III's coronation on May 6, the Princess of Wales shared whether or not her and Prince William's son Prince Louis, 5, will be on his best behavior for the big day.

"I hope so," Kate said with a laugh in a TikTok posted May 4. "You never quite know with kids."

After all, it was nearly a year ago when Louis—who is brother to Prince George, 9, and Princess Charlotte, 8—stole the show with his cheeky antics during his late great-grandmother Queen Elizabeth II's Platinum Jubilee four-day celebration.

During a June 2 photo opp at Buckingham Palace's iconic balcony, Louis, who was then 4-years-old, made grumpy faces at the camera and dramatically covered his ears amid the Royal Air Force flypast. A few days later, at the Platinum Jubilee Pageant, Louis was captured sticking his tongue out at Kate and putting his hand over his mom's mouth to shush her while they had a conversation.

As the world waits to see what Louis does during his grandfather's crowning ceremony, there's another young royal who'll also have a bright spotlight on him: George. The prince will take part in the coronation as one of Charles' four Pages of Honour, walking in the procession and carrying the king's robes inside Westminster Abbey.

"His parents are very excited and delighted that he is a page," a spokesperson for William and Kate told People in April. "It's something that his parents have thought long and hard about and are very much looking forward to—and I'm sure George is too."

For the latest breaking news updates, click here to download the E! News App