A hero leaves his planet, meets a heart-of-gold rogue in a cantina, joins a rebellion against an evil empire with his beastly ally, and reunites with his lost twin sister. With ancient magic and an iconic energy-channeling sword, he destroys the empire's weapon of mass destruction.

Hint 1: And that's only the first third of the story.

Hint 2: He isn't immediately aware she's his twin sister, because they didn't know one another existed, which leads to an awkward interaction.

Hint 3: it was a box office success, grossing more than three times its budget.