When Alex and Henry are on vacation reading together in the hammock, Alex is seen reading "One Last Stop", Casey McQuiston's second novel. Henry reads a book by Bernardine Evaristo.
According to director Matthew López, several weeks into the production, star Taylor Zakhar Perez inquired about whether or not he should shave his lower body for an upcoming nude scene by meeting with López in his trailer with makeup designer Karen Hartley acting as a mediator and lowering his pants, asking López to "Look at [his] ass." López responded, "You're fine, you're fine, you look great!" before following it up with "Taylor, yeah, just bring your hairy butt to set."
In the film, Alex's parents, President Ellen Claremont and Senator and First Gentleman Oscar Diaz, are still together and happily married. In the novel, they are divorced. Alex's mother remarried and his stepfather, Leo Castalazzi, is the First Gentleman. Naturally, due to the changes in the film, the character of Leo Catalazzi is eliminated. Alex says at one point in the novel that when he annoys one of his parents, he is referred to by the last name of the other parent.
This is the second time where Nicholas Galitzine plays a prince. He previously played Prince Robert in Cinderella (2021).
Casey McQuiston: As President Ellen Claremont's speechwriter. McQuiston is the author of the novel on which this film is based.