When we heard that they were making a TV show based on 'The Carrie Diaries', Candace Bushnell's Sex And The City prequel series, we were intrigued. For die hard SATC fans the concept seemed a little strange, and recently Sarah Jessica Parker said she finds the whole idea of Anna Sophia Robb playing a young Carrie a little "odd" herself.

"I'm not sure. You know, I think it's one of those tests of your generosity. She [Robb] is a lovely girl and I want her to feel good about it, but it's… odd", she commented not so long ago. That's all well and good, but Candace Bushnell, the woman who essentially gave life to Carrie Bradshaw, says SJP should know that "that's showbiz".

Speaking with The Daily Beast, Bushnell explained that everybody has to get used to seeing someone else play their character at some point or another. "Sarah Jessica's first part was somebody else's part. She played Annie on Broadway. She understands how these things work" she said. And it seems that wasn't the only fact of the "biz" she thought SJP would understand as, when asked about the possibility of a third SATC movie, she went on to say that the actress was getting a little bit too old to play the same old Carrie Bradshaw.

"Look, Sarah Jessica Parker is 47. I think with the second movie, Carrie Bradshaw couldn't be an ingénue anymore. But I think they were stuck doing what the audience wanted. Realistically, a middle-aged woman who was married without children would be much more focused on her career and less focused on this Mr Big: 'Does he love me?'... 'Does he still not love me?' I mean, I think it was coming to the end of what they could do with the character."

We're not quite sure what to take from that, so we'll draw the line at the suggestion that Bushnell thinks SJP needs to let the new young Carrie get on with it, just like she did when she was a bright young thing herself...