1. When Harry Met Sally… (1989)
Rob Reiner may have been the man behind the camera, but Nora Ephron’s screenplay deserves just as much credit for turning When Harry Met Sally… into an instant classic, taking her own career to the next level in the process.
An argument between college buddies over whether or not men and women can be friends without romance getting in the way yield repercussions a decade later when the two title characters reconnect.
When Harry Met Sally… revolutionized the rom-com and brought it kicking and screaming into the modern era by reinventing the tropes for more savvy audiences who wanted more than just beautiful people journeying from Point A to B in their relationship, and in those terms, no other film in the genre has ever done it better.