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
Charles told of his concern as he accompanied his parents on a three-day state visit to France to mark the 70th anniversary of the D-Day landings.
His father also has a packed agenda this week. On Tuesday, Philip will help The Queen host a Buckingham Palace garden party for 8,000 guests.
The following day he will preside over a Duke of Edingburgh awards dinner for the scheme he founded in 1956 to encourage young people to take up outdoors activities and other challenges.
Then the monarch's husband travels to present campaign medals in Fallingbostel, Germany in his role as Royal Colonel, of The Highlanders, Fourth Battalion, The Royal Regiment of Scotland.
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.