Xbox head Phil Spencer highlighted back in July that Microsoft was aiming to have all backwards compatible Xbox games playable on Xbox Series X and Xbox Series S at the launch of the console, with the exception of games that utilised the Kinect adapter for Xbox One.
And now, Microsoft has confirmed that is indeed the case, with Xbox director of program management Jason Ronald taking to Twitter earlier today to share the exciting news.
In a nutshell, this means you'll be able to play around 2500 Xbox One games from launch day with your new system, along with over 600 games from the Xbox 360 and original Xbox as well.
And of course, they'll also function better than ever before on Xbox Series X and Xbox Series S, taking advantage of performance improvements, visual upgrades and improved loading times.
Happy to see this finally confirmed? Let us know what you think in the comments.