What titles could Prince George and Princess Charlotte have when they are older?

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If you've been wondering what title Prince George will go by when he's older, a spokesperson at Debrett's, the authority on modern manners, weighed in on what the future could hold for the small royal and his siblings.

The spokesperson explained that everything will change after Prince William becomes King, including the children's titles.

Prince Louis, Prince George, Prince William, Duke of Cambridge, Princess Charlotte and Catherine, Duchess of Cambridge (Getty Images)

They said, "Charlotte is likely to become Princess Royal one day, as this is a title conferred on the eldest daughter of the monarch."

"Prince Louis may well take up one of his father's lesser titles, which in time will include those currently held by Prince Charles, although the majority of Charles's titles could be used by George, given that he will be Prince of Wales someday."

The family at Prince Louis' christening at St James's Palace (Getty Images)

And if you're most curious about the youngest member of the royal family, Louis will most likely one day inherit a major title of his own.

It won't be for a while though as Debrett's spokesperson said, "Louis is, however, unlikely to 'get a Dukedom' until he marries."

Since Prince Andrew doesn't have any sons and only has daughters Princess Beatrice and Princess Eugenie, that means that his titles will one day be up for grabs. That could make Prince Louis the Duke of York at some point.

(The Duchess of Cambridge)

Louis could also inherit one of Prince Andrew's other titles, which include Earl of Inverness and Baron Killyleagh, as they can't be passed down to his daughters. Those titles could also possibly go to Prince Harry and Meghan Markle's son Archie.