When Prince George Learned He Will Be King from Prince William, Kate [Video]

Although Kate Middleton and Prince William are focused on giving Prince George a normal childhood whenever possible, he’s aware that someday he will be the king.

Prince George, who will celebrate his 10th birthday on July 22, had a formal talk about his royal destiny in 2020, biographer Robert Lacey previously reported. It was a “controlled moment of their choice,” Lacey wrote, “reflecting William’s unhappiness at the haphazard fashion in which the whole business of his royal destiny had buzzed around his head from the start.”

But children’s wear designer Amaia Arrieta, whose clothes George and his siblings — Princess Charlotte, 8, and Prince Louis, 5 — have worn for years tells PEOPLE exclusively: “I think George has known almost from the beginning. He has always had a more prominent role — there have been many events with his late great-grandmother or great-grandfather when it was just him, and his siblings weren’t …