Why Prince Louis almost didn't get a royal title

Prince William and Kate Middleton's youngest child, Prince Louis, turned five in April, and the Princess of Wales released adorable pictures to celebrate the little Prince's birthday.

Over the last two years, Louis has made a number of public appearances and has charmed the public with his cheeky antics. 

However, the little royal almost didn't get his Prince title when he was born - and it's all because of an old law.

Following King Charles' coronation, Prince Louis is fourth in line for the throne after Prince William, Prince George and Princess Charlotte.

According to Hello! magazine, a law was in place which meant that only Prince Charles' first grandson - George - would be given an official title.

But a few years ago, the Queen changed a law that ensured the Wales' daughter Charlotte was right behind Prince George in the line of succession.

Previously, she would have been superseded by her younger brother, Prince Louis.

If this law had not been changed, William and Kate's youngest child would have been known as a Lord instead. 

Princess Anne, the late Queen's daughter, had the opportunity to give her children royal titles but she decided against it. Her husband, Mark Philips, also rejected an Earldom before their wedding. As a result, they were unable to pass on royal titles to their children, Peter Phillips and Zara Tindall, who otherwise would have been recognised with courtesy titles.

So, now you know!