What's more, the pair are known to share the same intense passion for national duty, with both of them serving in the armed forces.
But the remarkable throwback snap isn't the only photograph that shows how similar the pair are.
Prince Philip and Harry have shown similarities from as early on as when they were toddlers.
Prince Harry isn't the only member of the Royal Family who takes after a grandparent.
Both the Queen and Princess Charlotte share the same distinctive eye shape, with almost identical eye-brow shapes too.
Prince George has also been called out for looking just like his famous mum, the Duchess of Cambridge.
For Prince George's fifth birthday, the royal family released a very adorable photo of the young prince grinning from ear to ear.
While the photo is adorable on its own, many royal fans noticed that the 5-year-old is the spitting image of his mother, Kate Middleton, in a resurfaced snap.