Composer John Williams' brother, Don Williams, has teased details about the soundtrack for Star Wars: The Rise of Skywalker , saying that "every theme that you ever heard" will be present in the score for the final installment of the Skywalker saga.

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The Academy of Scoring Arts hosted a " score study " to celebrate the legendary composer's musical score for 1993's Jurassic Park last week, wherein Don - who has long worked alongside John Williams - openly discussed his brother's long-spanning career and their latest collaboration on Episode IX "It is top to bottom music," Williams explained about The Rise of Skywalker soundtrack. "We've done four days and we just scratched the surface. I think we've got something like 34 minutes in the canon at this point, but I can tell you that every theme that you ever heard is gonna be compiled into this last effort."Don Williams, who is a veteran studio percussionist, went on to drop some details about the highly anticipated film, as he revealed that the score would include musical themes for "everyone." He name-dropped Leia and Yoda, and also mentioned "the Phantom" and "Darth." Williams is obviously using shorthand here, but we presume he's referring to "The Phantom Menace" which means we might hear a Duel of Fates reprise, and that we'll also get some of the iconic Darth Vader tune. [Editor's note: this section was edited for clarity.]"It's gonna be in there and in his usual style, he hides them. You gotta go look for them. You'll find them, but you gotta go look for them," he said, adding, "You'll be sitting there watching the film go by and, oh, there it is! There's two bars of it and it grabs you and takes you away."Williams also disclosed the huge scope of the project, as he confirmed that his brother has "135 minutes worth of music to write," hinting, "that kind of tells how long the film is."The score will reportedly be wrapped up in September, just a few months out from the release of Star Wars: The Rise of Skywalker , which is slated to hit theatres on December 20, 2019 For more Star Wars, check out everything we know about The Rise of Skywalker , find out how The Last Jedi director Rian Johnson is okay with the next film retconning Rey's parents , and take an early look at the brand new Sith Trooper armour

Adele Ankers is a Freelance Entertainment Journalist. You can reach her on Twitter