National treasure and broadcaster David Attenborough turns 100 today and the birthday messages are rolling in – with Prince William leading the well wishes from his celebrity friends. The Bafta-winning presenter’s milestone birthday will be celebrated tonight on BBC One, with host Kirsty Young reflecting on his stellar career and life in a live 90-minute special . Beginning his TV career presenting Zoo Quest in 1954, Sir David went on to host a series of groundbreaking nature documentaries – from Planet Earth to The Blue Planet. Kicking off the birthday messages on Friday (8 May) was Prince William, who previously worked with Sir David on the Earthshot Prize – an environmental award the royal launched in 2021. In a video posted to the Earthshot Prize social media accounts, Prince William said: “Happy 100th David. I cannot believe it’s your 100th birthday.…