Prince George is third in line to the throne (Image: GETTY)
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This means that three royal reigns will have to run their course before George can take the Crown.
Queen Elizabeth II, 94, is the longest-reigning monarch in British history and still shows no sign of stepping down.
Next year she is due to mark her Platinum Jubilee which will see her celebrate an astonishing 70 years as monarch.
In the time the Queen has been on the throne, British society has undergone huge shifts and a royal expert has claimed interest in the monarchy is waning.
Prince George s grandfather Prince Charles is the oldest heir apparent in British history (Image: GETTY)
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