Fan Casting Star-Crossed Lovers in Sort by Tropes

Two lovers, doomed to be kept apart no matter how hard they struggle to be together. It may be Fate, or fatally-Feuding Families, or it may be something as mundane as a few hundred miles' separation, but something will always be in their way. Often, the two can only be Together in Death. William Shakespeare's Romeo and Juliet is the most famous example (and the Trope Namer), but the archetype dates at least as far back as Mesopotamian Mythology and Egyptian Mythology, making it Older Than Dirt.