In one photo, the family poses very properly, while they share a laugh in another.
The family will today celebrate the occasion with a glamorous private evening party at Buckingham Palace, after the Prince and Duchess of Cornwall spend the afternoon taking tea with a group of septuagenarians linked to their favourite charities. His elder son, the Duke of Cambridge, also contributes, disclosing how he hopes to emulate the Prince in teaching his own three children, Prince George, Princess Charlotte and Prince Louis, about the natural world.More news: Pokemon Go Dev's Harry Potter Game, Wizards Unite, Gets First Trailer
The candid photo was taken the same day as the new formal snaps and shows Prince Charles as a doting grandfather to the little prince.
Prince Charles turns 70 on Wednesday.More news: Armie Hammer Slammed for Criticizing Celebrities' Stan Lee Tributes
The palace just shared a never-before-seen pic of the family celebrating Prince Charles's 70 birthday at Clarence House, and all we have to say is...who's standing behind the camera?
The picture was featured in a new BBC documentary called Prince, Son And Heir: Charles At 70, also marking Charles' birthday.
This is the first time we've seen the family all together since Prince Louis' christening in July. "He will get down on his knees and crawl about with them for hours, you know making amusing noises and laughing".More news: Carmelo Anthony Not In Plans If Released By Rockets
The latest snaps follow the release of a attractive photo of tiny Prince Louis in his mother's arms as he played with Prince Charles. The film, "Prince, Son and Heir: Charles at 70", tracked the Prince of Wales for the a year ago providing an intimate look at Charles as a father and grandfather behind palace walls. Meanwhile, the royal household is also all set to welcome a new member with Prince Harry and Meghan Markle as the to-be- parents.