Sir David Attenborough is British broadcaster and naturalist, known for his more than 50 years of work on some of the most acclaimed nature documentaries ever filmed. Primarily the "Life" series. 
From a BBC documentary:
BBC: The question of God arises for anyone who studies the natural world, as you have. Was it a religious upbringing?
Attenborough: Not at all, No.
BBC: Have you, at any time, had any religious faith?
I find it far more awesome, wonderful, that creation; our appearance in the world; should be the culmination, or at least one of the latest products of 3,000 Million years of organic evolution, than a kind of country trick, taking a rib out of a man's side in a trance. 
"It never really occurred to me to believe in God." 
During an appearance on Friday Night with Jonathan Ross show:
Ross: Do you, yourself, do you, are you are religious person? Do you believe in God?
Attenborough: Well, put it this way. I do not think that knowing that life has developed from its simplest forms over 3,000 million years, as awesome a story as you can possibly imagine. I don't think that necessarily means that you can't believe in God?
Ross: That's a kind of agnostic view of God.
Attenborough: I mean, my view is that I don't know one way or another. But, I don't think that evolution is against a belief in God.