R.J. Cutler had given all the cast a personal iPod featuring the songs that he thought each character would listen to. Chloë Grace Moretz got an iPod with Classical music while Jamie Blackley got an iPod with Rock music.
Set in Portland, Oregon, all filming was done in Vancouver, British Columbia, which is across the bay from Vancouver Island, home of BC's capital Victoria. If that's not confusing enough, Portland has a river border with Vancouver, Washington, named for the same 18th-century British sea captain. The fact that so many locations on both sides of the USA-Canada border have the word Vancouver in the name, is a source of considerable frustration to many residents therein.
Catherine Hardwicke was attached to direct, but was replaced by Brazilian filmmaker Heitor Dhalia, who also left the film later. On January 24, 2013, Moretz was officially cast to play the lead and R.J. Cutler was announced as the new director of the film.