Rian Johnson has ruled out using the 'Knights of the Old Republic' in his upcoming 'Star Wars' trilogy.

The 43-year-old filmmaker has helmed the eighth instalment of the 'Star Wars' franchise, 'The Last Jedi', and he has been hired by Lucasfilm and Disney announced Johnson will be working on a new trilogy separate from the current Skywalker saga after the release of 'Episode IX'.

The sci-fi saga has spawned a number of spin-off TV shows, books and video games, with RPG being one of the most popular and immersive pixelated adventures.

But Johnson admits it's unlikely that he will borrow from past 'Star Wars' media because the ''sky's the limit'' when it comes to stories a galaxy far, far away.

Speaking to Uproxx, Johnson said: ''I played that game when it first came out and it was like, 'God, I loved it.'

''Yeah, that's a fantastic game. And I understand it, the instinct to automatically go to something that you know and love, that you've already seen. What's really fun is the notion of what new stuff are we gonna see, what new stories can we tell? The possibility in a new story told over three movies, go anywhere, do anything, the sky's the limit, in 'Star Wars'. That's so exciting.''

The 'Knights of the Old Republic' takes place almost 4,000 years before the formation of the Galactic Empire, where Dark Lord of the Sith, Darth Malak, has unleashed a Sith armada against the Republic.

The 'Star Wars' universe has already been expanded on the big screen away from the main movies with 'Rogue One: A Star Wars Story' and the upcoming Han Solo spin-off.

Recently, John Boyega - who stars as Stormtrooper-turned-Resistance fighter Finn in the latest trilogy - revealed he wants to see a Yoda origin story get told.

The 25-year-old actor believes there are some great ''fan theories'' that could be used as story ideas for the big screen.

Speaking to Collider, Boyega said: ''I think they need to go back to the Old Republic, how they do in the games, and discover what's going on there.

''There's some cool stuff in the 'Star Wars' universe they can use, there's cool fan theories they can use that could be part of the movies too, I mean, why not? Personally, I want to see a Yoda origin story.''