Continuity mistake: After Carrie hits Big with the bouquet, the amount of petals on the floor changes between shots.
Continuity mistake: When Carrie and Louis are together at the bar, Carrie's drink changes between shots.
Other mistake: Charlotte's dog had puppies during the show's final season and in the last episode we saw her and Harry walking them all. All the pups looked like pure-bred Cavalier King Charles spaniels (like their mother), even though they were mongrels. In the movie, the dogs are completely different and appear to be long-haired Jack Russells.
Visible crew/equipment: When Carrie walks to the building to get married, a crowd at the back is watching the shooting of the film.
Continuity mistake: When Sam throws the sushi at Smith, the splatter on the fridge changes between shots, even when no food is being thrown.
Continuity mistake: When Carrie receives the Valentines card, the envelope's seal flap is extended or not depending on the shot.
Continuity mistake: Carrie receives a Valentines card and turns it around. Depending on the shot she's either holding it from the lower part or from the side.
Continuity mistake: During the job interview, Carrie asks Louise the last question. She stretches her hands and crosses her fingers. From the opposite angle her right hand is extended, but the left one is under the table.
Continuity mistake: When Lily asks Carrie to read her Cinderella again Carrie opens the book. From the opposite angle it's closed and she's opening it again. From the next angle it's closed again.
Continuity mistake: When Carrie sees Charlotte's baby, her arm is bare and over Charlotte's arm. From the opposite angle it's hidden inside her pajamas.
Continuity mistake: When Carrie takes the first bite at her sandwich, she holds it perpendicular. Also, there's a bit of bread and egg standing out. A shot later, the bit is gone and the sandwich is parallel.
Revealing mistake: When the girls arrive at the wedding, a group of fans on the upper left corner are gathered watching the filming.
Visible crew/equipment: After the wedding, when Big and Carrie's car cross, a big, long rectangular black structure in the middle of the road is reflected on Big's car. Most surely where the camera and team were.
Continuity mistake: When Carrie reads the Beethoven poem her right fingers disappear from the book in the close-up shot.
Continuity mistake: Carrie holds the Vivienne Westwood card with her right hand, but a shot later she holds it with both hands.
Revealing mistake: Carrie is flipping through her book's pages. In chapter 14 the lines "Upper East Side neighborhood" are repeated over and over again.
Character mistake: At the rehearsal dinner, when Steve walks up to Miranda she calls Steve "Dave." Dave is his real name.
Other mistake: In the "fashion show" that takes place as Carrie is packing, neither Miranda nor Samantha could even begin to fit into Carrie's clothes.
Visible crew/equipment: When Big is on the phone with Carrie while having trouble writing his vows, you can see a camera in the reflection in the window behind him.
Continuity mistake: When Big and Carrie are discussing the number of people invited to the wedding, Big says it's a circus and retreats to the bathroom to brush his teeth - at first, he has a toothbrush in his hand, but when he cuddles Carrie, the toothbrush is gone.
Suggested correction: It does show him placing the toothbrush down on the counter. You can see his eyes quickly look to the right and you can see his right arm slightly move a little as he places the toothbrush down on the counter just before he embraces Carrie.
