Jacob Elordi, who stars with Joey King in The Kissing Booth (also released in 2018), can be seen, standing as a shirtless extra, in the party scene at the beginning of the movie.
Erin Darke who stars as Hope has been in a relationship with Daniel Radcliffe since 2013; Joey King's character has a love for Harry Potter who was played by Daniel in the movies.
Becca Gleason, the screenwriter and director, graduated from Indian Hill High School in Cincinnati in 2006, having participated in the high school TV program, Braves Beat.