The Force Awakens finally hits theaters this weekend and the cast is getting fans into the Star Wars spirit with a little a cappella medley. Aided by Jimmy Fallon and The Roots, everyone from old favorites Han Solo, Leia, Chewbacca, and R2-D2 to series newcomers like Finn, Rey, Kylo Ren and BB-8 perform a couple of John Williams classics as the series’ main theme meets “The Imperial March” —Brady Bunch-style.