In Cats, they literally forgot to CGI Dame Judi Dench’s wedding ring off of her hand. I mean paw.
And they didn’t even bother making Rebel Wilson’s hand appear less human in some parts of the movie trailers, either.
In Avengers: Endgame, during the final battle scene, Ant Man was in the van, trying to turn on the quantum tunnel. In the next shot, it showed him giant and fighting the bad guys. Then, a few seconds later, it showed him back in the van again.
In The Great Gatsby, Gatsby entered the house completely soaked from the rain, but later on in the same scene, his clothes and hair were 100% dry.
In Crazy Rich Asians, the actor who played Rachel’s TA at New York University in the beginning of the movie mysteriously made his way into the final scene, which took place in Singapore.
In Titanic, Jack mentioned that he went ice fishing on Lake Wissota, but that lake wasn’t formed until 1917, five years after the Titanic sank.
In To All the Boys I’ve Loved Before, Lara Jean’s cardigan was inside out in one shot but then switched to the correct way in the next shot.
The bullet holes already present in the wall before the shots are fired in “Pulp Fiction.”
This is another classic movie mistake, especially since the scene is so iconic. The error even messes with the plot, making it especially egregious.
Independence Day (1996)
During David’s tirade in Area 51, where he bemoans the fate of the planet and rails against deforestation and pollution, he drunkenly knocks over a bin that’s labeled with the words “Art Dept” Either the top secret installation has its own stable of designers, or a set dresser accidentally left his garbage can behind.