Penelope Cruz has been lensing a cameo for the new movie, and it doesn't look good for Sarah Jessica Parker's on-screen persona.
The Spanish siren was spotted in a sexy backless dress at New York's Empire Hotel earlier this week working on a scene in which she apparently gets a little too close to Big, played by Chris Noth.
Producers have kept details surrounding Penelope's character firmly under wraps, but she's rumoured to be playing a big shot banker.
The Oscar-winner isn't the only famous new name to have signed up. Liza Minnelli has also been added to the cast – though it's unknown whether she'll be playing herself or a character.
And it's been confirmed Jason Lewis – aka Smith Jerrod – will be returning as Samantha's younger ex. The model-turned-actor will be celebrating the opening of his latest blockbuster alongside his former girlfriend, who is now single.