'Guardians of the Galaxy' became the summer's top-grossing movie at the North American box office with a $17.6 million weekend that narrowly bested the young adult melodrama 'If I Stay.'

When Jamie Blackley first appears in If I Stay, he's walking down a hallway in a leather jacket with a guitar slung on his back, as swooning cheerleaders spin around to stare.

Cameras are set to roll on the drama "If I Stay" from Oct. 30 to mid-December.