Today, 9 June, Prince Philip turns 99.The Duke of Edinburgh will be spending the day much like he has spent his entire adult life; by Queen Elizabeth II's side.The pair have been married since 1947 and their relationship timeline is one that begins in the 1930s, spanning over 70 years and what a remarkable love story it’s been. It was when the Queen was 13 years old that Prince Philip became a glint in her eye during the summer of 1939.