A new book has claimed that Prince George delivered a sassy comeback to a fellow classmate during a tussle on the playground, flouting his royal status.

According to journalist and author Katie Nicholl, who wrote The New Royals – Queen Elizabeth’s Legacy and the Future of the Crown biography, the second in line for the throne called out a student during a scuffle at the young royal’s former school Thomas’ Battersea in south London.

Katie wrote that the Prince replied to his peers with the line, “My dad will be king so you better watch out,” when they were messing about on the playground one day.

In her book, she wrote, “They [Prince William and Princess Kate] are raising their children, particularly Prince George, with an awareness of who he is and the role he will inherit, but they are keen not to weigh them down with a sense of duty.”

“George understands he will one day be king and as a little boy sparred with friends at school, outdoing his peers with the killer line, ‘My dad will be king so you better watch out.’”

The royal children now attend the elite Lambrook School in Berkshire, west London, as Prince George, Princess Charlotte and Prince Louis were pictured with their parents for orientation day earlier this year.

The young royals were welcomed by headmaster Jonathan Perry at the front gate, as they all said they were excited for their first day.

Image credits: Getty Images

This article first appeared on OverSixty.