The new programme will feature new interviews of the wildlife broadcaster and the original production team as they reflect on the making of the series.
It will also touch on the challenges they faced along the way, including a coup in the Comoros, being shot at, as well as Sir David’s famous encounter with gorillas in Rwanda.
Sir David will also appear in a new series, Secret Garden, in which he will reveal the hidden worlds within Britain’s gardens.
Over five episodes filmed across the UK, the series will capture the rich diversity of life in Britain’s back gardens while also reflecting on how the public can do their bit to save struggling species.
And the presenter will appear in David Attenborough’s 100 Years on Planet Earth, a live event from the Royal Albert Hall featuring the BBC Concert Orchestra and special guests.
The week will also revisit episodes from Sir David’s most-loved series including Planet Earth, One Planet, Blue Planet, Frozen Planet, Planet Earth and his most recent special Wild London.
Jack Bootle, head of commissioning for specialist factual at the BBC, said: “It’s impossible to overstate what Sir David Attenborough has given us.
“His programmes have not only defined science and natural history broadcasting, but they have also changed how we see our planet and our place within it.
“This special week is a celebration of an extraordinary milestone and of a body of work that continues to inspire awe, curiosity and care for the natural world.
“It’s also a moment for all of us at the BBC to say thank you to David – for his generosity, for his brilliance and for a lifetime spent bringing the wonders of nature into our homes.”