- Directors: Michael Patrick King
- Producers: Michael Patrick King, Sarah Jessica Parker, Darren Star
- Writers: Michael Patrick King
- Genres: Comedy, Drama, Romance
- Actors: Sarah Jessica Parker, Kim Cattrall, Kristin Davis, Cynthia Nixon, Chris Noth, Jennifer Hudson, Candice Bergen
Set three years after the events of the series finale, the film begins with Carrie (Sarah Jessica Parker) and Big (Chris Noth) viewing apartments with the intention of moving in together. Carrie falls in love with a penthouse suite far from their price range, which Big immediately agrees to pay for. However, Carrie experiences doubts over the sensibility of this arrangement, explaining that they are not married, and as such she would have no legal rights to their home in the event of a separation. She offers to sell her own apartment, and quelling her fears, Big suggests that they get married.
Miranda (Cynthia Nixon) is finding balancing her home, work, and social life ever more difficult, and confesses to the girls that she hasnâ€™t had sex with Steve (David Eigenberg) in six months. She is devastated when Steve reveals he has slept with another woman, and immediately separates from him. Samantha (Kim Cattrall) is living with Smith (Jason Lewis), who has a successful television career. They live in a seaside luxury apartment in Malibu Los Angeles, where Samantha is finding it difficult to take time for herself. She is traveling frequently between L.A. and New York, and grappling with her persistent desire for sex with other men; her handsome and sexually active next-door-neighbor, Dante (Gilles Marini), in particular. Charlotte (Kristin Davis) is happy in her marriage to Harry (Evan Handler), with their adopted daughter, Lily (Alexandra and Parker Fong).
One hour before the locks are due to be changed on their shared penthouse apartment, Carrie travels to the home Big had bought for them to collect a pair of mint condition blue Manolo Blahnik shoes she had left there. She finds Big in the walk-in closet he had built for her, and the moment she sees him, her anger at his betrayal dissipates. She runs into his arms and they share a passionate kiss. After spending the final hour in their apartment together, talking and apologizing to one another, Big proposes to Carrie properly, using one of her diamond-encrusted shoes in place of a ring. They later marry alone, in a simple wedding in New York City Hall, with Carrie dressed in the original dress she had bought in a vintage shop and the blue Manolos. They hold a get-together at a local diner with their friends. The film ends with the four women around a table in a restaurant, sipping cosmopolitans, and celebrating Samantha’s fiftieth birthday, with Carrie making a toast to the next fifty.