Movies
Rex Features
The actor, who reprises his role as Carrie's boyfriend Mr. Big, said he wanted to keep fans guessing about the plot of the film.
Several alternate endings were shot in New York to throw reporters and onlookers off the scent.
He told the Glasgow Daily Record: "People were just so desperate to see what we were doing. It cracked me up.
"So we had to do a lot of fake endings and I would do things such as suddenly walking by a journalist and saying, 'Yeah, it's too bad Carrie died.'
"I said a lot of things like, 'It's all just a dream, isn't it? It is so much fun when she wakes up from the nightmare.'"
The movie had its world premiere in London on Monday.
> Sex And The City star becomes a dad
More: Chris Noth, Movies
Movie Reviews
'The Vow' reviewChanning Tatum tries to win back Rachel McAdams in romantic drama The Vow.
At the Movies
This Week's 5 Hottest Movie VideosTrailers for The Avengers and Spider-Man are among this week's highlights in film.
Movies Interviews
Daniel Radcliffe talks 'Woman in Black'The actor talks to Digital Spy about his first post-Potter outing.
Box Office Charts
'Chronicle' leads UK box officeSuperhero drama Chronicle leads the UK box office ahead of Journey 2.
