Kim Cattrall occasionally came to the set wearing a wedding dress for the benefit of the paparazzi photographers, to trick the public into thinking that her character Samantha Jones would get married in this film.
The dress Carrie wears to dinner when Mr. Big picks her up from her old apartment, is the same one she wore when apologizing to Natasha, Mr. Big's ex-wife, for her and Mr. Big's affair in Sex and the City: What Goes Around Comes Around (2000).
Two comedians from New Zealand, Tim Batt and Guy Montgomery, are watching this film each week for fifty-two weeks (as of February 2015) and discussing it for their podcast, "The Worst Idea of All Time". They previously did this with the Adam Sandler movie Grown Ups 2 (2013).
In May 2015, Sarah Jessica Parker posted a teasing photo of her with a shopping bag, in order to promote her collaboration with Bloomingdales. However, the photo went viral, when it proved so ambiguous, that several fans believed the photo teased a potential third "Sex and the City" movie. Several online outlets reported the announcement, and an unaware and puzzled Cynthia Nixon, co-star of the show, was asked about it during a live interview. In the end, Warner Brothers Studios had to make an official statement that there was no plans for a "Sex and the City 3".
It was erroneously reported that due to a product placement deal with the studio, Carrie Bradshaw would own a Hewlett-Packard laptop, instead of an Apple Macintosh laptop. Bradshaw owned a PowerBook G3 in the series, and a PowerBook G4 in the first film. Bradshaw's laptop is the same PowerBook G4 seen in the previous film. Samantha uses a Hewlett-Packard desktop.
The trivia item below may give away important plot points.
The blue Manolo Blahnik pumps that Carrie leaves in the penthouse, and that Mr. Big uses as the "diamond to seal the deal", are visible over her left shoulder when she's in her closet packing for Abu Dhabi.