While this is a no-brainer—When Harry Met Sally is a romantic comedy through and through—there's still a great deal to discuss. After all, it's not just a romantic comedy. It's pretty much the romantic comedy—for the last quarter-century, at least.
While the movie has undoubtedly shaped all the romantic comedies that have been produced in its shadow, there's no denying that When Harry Met Sally also owes a big fat debt to all the old-school rom coms that came before it. You can't revolutionize a genre, after all, without first walking in its footsteps.