A naval officer and a gentleman known for his mischievous sense of humour, Prince Philip celebrates his 93rd birthday on Tuesday 10 June.
The doughty royal patriarch refuses to slow down and still does his own driving - as his son Prince Charles revealed last week, admitting: "I'm always worried".
CLICK ON PHOTOS FOR 15 FACTS ABOUT PRINCE PHILIP
Friday will involve an engagement at an outdoor education centre in Sussex - before the week ends with Trooping the Colour, which is the Queen's official birthday parade, on Saturday.
Then, on June 16, the royal couple will take part in the Order of the Garter service at St George's Chapel, Windsor Castle. Next week is also Royal Ascot, one of their favourite dates in the horseracing calendar.
To celebrate the indomitable Prince, HELLO! Online has chosen 15 facts about him and the vital life he still leads.
Watch: Prince William takes George to meet his sister
It's a little princess!