When the boys and girls are calling each other to play songs on the record player, they don't use the standard '555-' phone numbers used in television and film.
After she had written the script, Sofia Coppola was heartbroken to discover that another company was already producing an adaptation of the book themselves. However, they were not happy with their script, so she showed them hers and they ended up using it instead.
A world map, using the far less common Gall-Peters projection, can be seen in background in the scene where the boys exchange songs with the Lisbon sisters over the telephone
Kim Basinger was originally offered the role of Sara Lisbon, but after the success of L.A. Confidential she became very expensive. Alyssa Milano was also considered for the role of Sara Lisbon, but dropped out from the project due to scheduling conflicts from Charmed.