The Star Wars cast and some very special guests have teamed up for a unique rendition of the iconic John Williams theme tune.

Daisy Ridley, John Boyega, Gwendoline Christie, Lupita Nyong'o, Carrie Fisher and Harrison Ford joined forces with Jimmy Fallon and The Roots for a very special performance.

The stars got together for a one-off a cappella version of the Star Wars theme - but be warned, once you watch it, you will be humming the tune all day.

Once you've watched the video click here to read our Star Wars: The Force Awakens review.