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
When Lee forgets about Rachel and you see her standing outside the cinema you can see above amongst the films that are playing is 2 Hearts which stars Jacob Elordi.