Joey King shaved her head for her role in The Act (2019), so she had to wear a wig when filming this movie.
Some pictures of Elle and Noah that are used in the movie, are pictures of the two actors, Joey King and Jacob Elordi, from when they were together.
The movie is set in Los Angeles but mostly filmed in Cape Town, South Africa.
The actor Taylor Zakhar Perez is 10 years older than his character, Marco
In the first movie, it is known that Elle's full name is Shelley, but it's revealed that in this movie that her full name is Rochelle, which follows the books.