Queen Elizabeth II has been preparing Prince Charles to be the next king when the time comes that she has to abdicate the throne. With Her Majesty's constant royal tours when the Prince of Wales is still young, it looks like he already knows how to be independent at a young age.

According to Express, the monarch left her eldest son and Princess Anne for six months to perform her royal duties, together with husband Prince Philip. When George VI died in 1952, Queen Elizabeth was crowned as the new queen.

In 1953, she had to embark on an official Commonwealth tour, visiting 13 countries for six months. At the time, she had to leave Prince Charles, who was only five years old, and Princess Anne, who was three years old, behind to her mother, Queen Elizabeth The Queen Mother, and their nanny, Mabel Anderson.

This taught Prince Charles to be independent at a young age. However, it looked like it wasn't what the heir to the throne wanted when he had his own kids.

When Prince William and Prince Harry were born, he and the late Princess Diana chose to travel with their kids when they would go on a royal tour. Hence, the Duke of Cambridge went on a trip to Australia and New Zealand with his parents at the tender age of nine months old.

Today, Prince Charles is 71 years old. He is celebrating his special day in India, where he is on a royal tour to perform his duties. It can't be denied that he has been to a lot of highs and lows throughout his life - from his separation and divorce from Princess Diana to his marriage to Camilla Parker-Bowles.

Forbes reported that he is the oldest king to assume the British throne from his mother. However, this is not the only record he breaks at his age. He is also the oldest and longest-serving heir apparent in British history. He surpasses the record of William IV, who succeeded the throne at the age of 64 in 1830.

Prince Charles is also the longest-serving Prince of Wales, a title he got in 1958. The British media, which gave him the name of "the perpetual prince," is making fun of his age records while waiting to inherit the throne. However, he is confident of what he does and said he doesn't see himself on standby but doing his job while enjoying his freedom.