The cast of “Star Wars: The Force Awakens” showed off their rare musical talents on “The Tonight Show” in a new video released Tuesday that is sure to become a viral sensation.

Daisy Ridley, John Boyega, Oscar Isaac, Adam Driver, Gwendoline Christie, Lupita Nyong’o, Carrie Fisher and Harrison Ford joined Jimmy Fallon and The Roots for an a cappella tribute to the “Star Wars” that can only be described as out of this world.

“A long time ago, in a galaxy far, far away …” began the familiar scrolling message across the screen, before Fallon and his house band appeared singing the theme song from the classic score by Oscar-winning composer John Williams.

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Soon Ridley joined them by way of the colorful split screen, then Driver jumped in for the imposing beat of the Dark Side — with Fallon and The Roots dressed as Stormtroopers.

Boyega, Isaac, Driver, Christie, Nyong’o, Fisher and Ford rotated in and out as the screens expanded, and even R2-D2, C3-PO and Chewbacca lent their diverse vocal talents to the medley.

“Star Wars: The Force Awakens” invades theaters on Dec. 18.

Watch the video.