Cameron Diaz wanted to be a zoologist when she was younger.

The 'What To Expect When You're Expecting' actress says she was always keen to work with animals when she grew up as she found them so interesting.

Speaking to wildlife expert Sir David Attenborough on tomorrow night's (25.05.12) 'The Graham Norton Show', Cameron said: ''I am so excited to meet you, because I wanted to be a zoologist. I thought I would be one for my entire life and I did end up studying animals, but human animals.

''As an actor that's what I do, but I find so many surprises when I watch your shows.''

David, 86, said he would be more than happy to teach 39-year-old Cameron about wildlife, saying: ''I could teach you all sorts of things. You should see the out takes.''

The blonde beauty then replied: ''Perhaps we could have a private viewing!''

Cameron also spoke about how difficult it was to wear a prosthetic baby bump and enhanced cleavage in 'What To Expect When You're Expecting'.

She said: ''The breasts got bigger and bigger, there was probably 15 of those weird silicon cutlet things in there. They were amazing and I was like, 'Wow these are awesome!'

''So I had to show them off to everyone shouting ''look at these.'' They looked very real!''