Annie and Bryan's wedding invitation is shown with the date October 30 when in Father of the Bride (1991) they were married January 6th.
Annie's name as shown on her wedding invitation, seen at the beginning of the film, is "Anne Elizabeth", but in Father of the Bride (1991), we hear the minister give her name as "Anne Catherine" during the wedding ceremony.
In the first "father of the bride" George says they engraved their names on the tree out the front then in part two Annie says the tree is out the back.
Annie's shoes change from Reeboks to plain white shoes and back to Reeboks between shots in the basketball montage even though it is supposed to be the same game she is playing.
Early in the movie, George says the "trees were golden". Immediately after this, George is driving down the road and all the trees are green with the exception of one tree where the leaves on the bottom are just starting to turn.
During the scene where George shows Nina his new hair and they are sitting on the floor, the water from the rain is dripping from the ceiling, when in fact they are in a 2 story house, so any water would drip from the upstairs ceiling not the downstairs.
Mr. Habib pays George Banks $15,000 using $1000 bills. The US government had begun taking large denomination bills out of circulation in 1969, so the bills would technically had been part of a private collection and would have been worth far more than their face value.
When Annie moves in with her parents, George narrates that Nina was 4 weeks from her due date and Annie was 2 days passed hers. However, the due date given for Annie was July 26 and the due date given for Nina was Sept 4. If it is in fact 2 days after Annie's due date (making it July 28), it would be a little over 5 weeks away from Nina's due date - not 4 weeks as stated.
George is sitting in the hospital while he's still out of it from the sleeping pill when somebody took him back for a proctology exam. It's night and the office would be closed. Because it's summer and it's dark it has to be after 8 at night.
It would have been possible for Annie to score 20 on the word "ouch" in the scrabble game if the the word crossed the double word score square, and the "C" came from a blank tile.
During the scene when George is holding his daughter and grandson you can see the doll's heads when the light is reflecting off of them.
Nina supposedly went into labor and delivered her baby a month early but when George is holding Megan in the hospital she is a large, plump baby. A baby born a month premature would not be that big.
It is incorrectly regarded as a goof that Nina and George's baby could not be big and plump because she delivered approximately 4 weeks early. Not all premature babies are small, and it is possible to have a pre-term newborn that weighs 8lbs or more, especially since women over the age of 35 (like Nina) are more likely to have babies that are larger than average.
In the beginning of the movie Annie & Bryan's wedding invitation has the date of October 30th, however in the first movie Franck says their wedding date is January 6th and later George says they made it to January and it was the day before the big day.
When George passes out at the dinner table, even though the interior lights are on, you can see out the windows there is daylight. Again as Franc drags George into the Living Room, again you can see day light out the windows. However, when the pregnant women are waiting for Franc in the car to drive them to the hospital, only minutes go by and Franc drags George out the front door and it is pitch black outside.
In the opening sequence, Annie and Bryan's wedding invitation is shown. It states that the wedding will be held on "Saturday October thirty nineteen hundred and ninety one." October 30, 1991 was a Wednesday, not a Saturday.
In the closing sequence when George's daughter (and her child) drive away, we see the bright Sun shining straight onto the front of the house. Then when George watches his daughter drive away, the Sun shines from George's right (from behind the house). When George walks to the front door, the Sun is to his left, across the front of the house.
When John asks George if he can fix George a drink, his lips aren't moving.
Filming of the scene where George and Nina are in the car after she finds she is pregnant, took place in on Greenleaf Blvd, in Whittier. All the street scenes outside Nina's window on her side of the car are heading southbound. And All of George's passing scenery is heading northbound.
The Banks' youngest son, Matty, is seen with the family the day they move out of their house, yet is not seen or mentioned until after they move back. He is not even present when George and Nina arrive at the McKenzies' mansion after they have moved out that day. No mention is made of whether or not he is staying with a friend or in school, or even how he is adjusting to staying at the new place.
When George has a flashback about the house he just sold, he states that he remembers his first game of basketball with his four-year old daughter Annie. However, in Father of the Bride (1991), Annie states while packing her room before her wedding, that she has lived in the house since she was five.
When George is telling the family that he has sold the house and Mr. Habib has offered him $15,000 to be out of the house in 10 days, when Nina says 'George!' she is looking across her left shoulder, when in fact, George is straight ahead of her.
Nina complaining about being hot but wearing long sleeves all the time.