Happy 100th birthday Sir David Attenborough!

One of the world's most famous broadcasters celebrates a big birthday this week - it is of course Sir David Attenborough!

He turns 100 on Friday 8 May.

Over the course of his career he's done some incredible things, like overseeing some of the first ever colour-television broadcasts, and diving 1000ft underwater in a submarine at the age of 88.

Ricky has been finding out about his amazing life and what he means to you...