Museum of broken relationships actually exists in Zagreb, Croatia. It started out similar... Muzej prekinutih veza, Zagreb Croatia.

The song playing at the end of the film and over the credits is "Young and in Love" by Ingrid Michaelson from her 2019 album "Stranger Songs", which was inspired by the Netflix series, Stranger Things (2016). Dacre Montgomery who plays Nick, also plays Billy Hargrove in Stranger Things.

Selena Gomez and her mom Mandy Teefey serve as executive producers.

Both Geraldine Viswanathan and Dacre Montgomery are Australian despite playing Americans

This was TriStar Pictures' first film and Sony Pictures' second film to be shot in the Univisium 2.00:1 aspect ratio.