Sir David Attenborough receives a second knighthood from Prince Charles at Windsor and we couldn't be more proud

British TV presenter and all-round environmentalist icon David Attenborough received his second royal honor today at Windsor Castle.

Prince Charles bestowed the honor as David received a Knight Grand Cross of the Order of St Michael And St George. The knighthood was given to him for his services to television broadcasting and conservation work.

Now regarded as a national treasure Sir David, 96, received his first knighthood in 1985 when he collected it from the Queen. 

Both Prince Charles and Sir David looked delighted as the royal presented the TV star with his newest honor on Wednesday at an investiture ceremony at Windsor Castle.

Fans of the environmentalist and documentary maker were quick to highlight that this wasn't the first time he'd met Prince Charles, with one sharing a sweet picture of a young Charles in 1958 with sister Anne as they met David, who was holding a cockatoo. 

The Year Earth Changed presenter also has a close bond with the Queen as they both share a passion for charity work and wildlife. Showing their close bond earlier this year The Queen, also shared a heartbreaking joke with national treasure Sir David Attenborough.

As the pair were discussing, in January, during a tree-planting charity ceremony, the positive impact the trees would have on the planet over the next 50 years, the Queen simply said, "I won't be here though."

Other notable knighthoods on Wednesday were for Spy chief Sir Jeremy Fleming, director of GCHQ, and Professor Sir Andrew Pollard, director of the Oxford Vaccine Group.

Sir David has had an impressive career spanning 7 decades and via his documentaries, such as A Life on Our Planet and Natural World he has provided the world with unparalleled commentary on the planet's plants and animals in documentaries enjoyed by hundreds of millions of people the world over.

The National treasure was also part of the Queen's Platinum Jubilee celebrations this weekend as he joined other famous faces including Elton John and Diana Ross to feature in the Platinum party at the Palace.

Part of Prince William's section on the environment Sir David was projected onto the Palace. Prince William also said, "Together, if we harness the very best of humankind, and restore our planet, we will protect it for our children, for our grandchildren, and for future generations to come."