For many people, it wouldn't seem that long ago when Prince Charles was a dashing lad in his 20s, dressing up for polo games and attending various engagements with his royal affiliates.
But now, as the Prince turns the big 7-0, there's no denying plenty has happened in the Prince's life since.
From blossoming romances and becoming father to two striking young Princes, to a tragic separation, a new wife and attending more royal engagements than one can count – Prince Charles has seen a lot.
But, in the words of the future King himself, there is still so much that needs to be done. In fact, when he does eventually take the throne, we can expect to see a different side to Charles.
In a new documentary by BBC called Prince, Son & Heir: Charles at 70, the royal grandfather says that his involvement with the monarchy will take a different turn.
"I do realise that it is a separate exercise being sovereign. So of course… you know I understand entirely how that should operate," he said.
We can't help but trust the Prince, who has grown up to become a well-spoken environmental advocate, charity worker and charming guest at more royal engagements than one could count.
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But for now, the Prince of Wales will simply celebrate another milestone with those nearest and dearest to him, and we've got all the details.
It all starts with the Queen's reception and dinner in the State Rooms of Buckingham Palace, which will be held on Wednesday evening.
The event will be no casual affair – along with the royal family themselves, other European royal dignitaries including Crown Prince Frederick and Crown Princess Mary of Denmark will join Charles to celebrate the milestone.
But the festivities won't end there as tributes continue to flow for the future King.
One commemorative gesture is a selection of six new stamps featuring the Prince, which were released by Clarence House and Royal Mail earlier this week.
Photographer Chris Jackson of Getty, who snapped the above picture of Prince Charles, Prince William and Prince Harry shared the images on his Instagram along with the caption: "My official portrait of The Prince of Wales, The Duke of Cambridge and The Duke of Sussex is featured on this stamp commemorating The Prince of Wales's 70th Birthday."
He added: "I took this ahead of the RAF 100 Commemorations at Buckingham Palace this summer - I expect you all to send your Christmas presents only using this stamp!"
Two of the six stamps feature Prince Charles and his two sons, the other one of which was taken in 2004 at the polo before the boys became Dukes and family men.
Another stamp features Charles and wife Camilla, the photo of which was taken in Scotland by a friend of the Prince during the couple's 2015 summer holiday. It was also featured in their Christmas card that year as well.