Apple has added its "Apple Events" channel to the Apple TV ahead of today's big keynote. Users will be able to watch the entire event, streamed live from the Bill Graham Civic Auditorium in San Francisco, in high-definition.

Apple has also added a countdown timer, which ends at 10 a.m. Pacific today, when the event kicks off. This will be Apple's biggest event of the year so far, overshadowing WWDC with a whole host of exciting new hardware, including the iPhone 6s and iPhone 6s Plus.

The Cupertino company is also expected to unveil its rumored iPad Pro and a fourth-generation iPad mini, as well as a brand new Apple TV with Siri integration and an App Store that allows users to download third-party apps and games for the first time.

Apple is also likely to announce a release date iOS 9, as well as OS X El Capitan.

If you don't have an Apple TV, you'll be able to watch today's event on your Mac or iOS device through Safari, and on Windows 10 through Microsoft's new Edge browser.