Apple released its quarterly earnings report today. More on that here, but within that report, CEO Tim Cook just happened to mention that Mountain Lion will be released tomorrow.

“We’re thrilled with record sales of 17 million iPads in the June quarter,” Cook said. “We’ve also just updated the entire MacBook line, will release Mountain Lion tomorrow and will be launching iOS 6 this Fall. We are also really looking forward to the amazing new products we’ve got in the pipeline.”

The latest version of OS X will cost $19.99, and will be available on the Mac App Store. It’s worth noting that this is ten dollars less than the current version, Lion.

Here’s Apple’s promo for the OS:

Mountain Lion has over 200 new features, according to Apple. Peruse them here.

More Mountain Lion coverage here.