Carrie, Mr Big wouldn't have ended up together in real life:

They got their happy ending but Candace Bushnell, the author of "Sex and the City", says Carrie Bradshaw and Mr Big were not meant to be together.
The author, in an interview with The Guardian, says they gave into audiences' wish by giving Carrie her dream wedding.
"Well, I think, in real life, Carrie and Big wouldn't have ended up together. But at that point the TV show had become so big. Viewers got so invested in the storyline of Carrie and Big that it became a bit like Mr Darcy and Elizabeth Bennett... It became part of the lexicon.

"And when people are making a TV show, it's show business, not show art, so at that point it was for the audience and we weren't thinking about what the impact would be 10 years later."
Carrie and Mr Big got married in the first film "Sex and the City: The Movie", which came out in 2008.
It has been 20 years since Bushnell first wrote the story about four single friends navigating their love life in New York City but the column that spawned a book, a hit TV series and two movies, is still a big draw among fans.