Yara Shahidi was the first choice for Natasha by director Ry Russo-Young and the studio.
Charles Melton is of half Korean and British descent in real life.
The age difference between Yara Shahidi (born 2000) and Charles Melton (born 1991) is 9 years.
Based on the book by New York Times bestselling author Nicola Yoon.
It has some of the elements from Serendipity (2001) and near the end of both movies, the Caffe Reggio Original Cappuccino shop is also used.