Princess Leonor has been in the spotlight a lot more over recent years with the teenager royal marking her milestone 18th birthday last year. Here’s all you need to know about the Princess of Asturias and the future Queen of Spain Princess Leonor has been in the spotlight a lot more over recent years with the teenager royal marking her milestone 18th birthday last year. Here’s all you need to know about the Princess of Asturias and the future Queen of Spain