Kinect is the fastest-selling consumer electronics device in history.
That's according to chief financial officer Peter Klein, who was talking in a conference call listened to by VentureBeat.
It means Kinect has sold faster than any Apple device, telly or games console ever released.
Kinect has sold an astonishing eight million units in the first 60 days after its November 2010 launch, contributing to a whopping $3.7 billion in revenue for the Entertainment & Devices division in the quarter ended 31st December, up 55 per cent from $2.4 billion a year earlier.
Microsoft will no doubt be delighted by the impact its motion-sensing add-on has had on its games business, and will consider it a vindication of its reported half a billion dollar marketing spend.
Microsoft saw 42 per cent growth in US console sales in 2010, mainly due to the launch of the Xbox 360 slim in June. Microsoft sold 6.3 million Xbox 360 consoles during the holiday season, up 21 per cent.
Earlier this month Microsoft crowned 2010 as the biggest year in Xbox history.
"The debut of Kinect and smash-hit games like Fable III and Halo: Reach drove Xbox to the biggest year in its history in 2010," the company blurted.
Looking ahead to 2011, Microsoft ringed upcoming blockbuster Gears of War 3 as well as Kinect-focused experiences Hulu Plus and Avatar Kinect.
Become a Eurogamer subscriber and get your first month for £1
Get your first month for £1 (normally £3.99) when you buy a Standard Eurogamer subscription. Enjoy ad-free browsing, merch discounts, our monthly letter from the editor, and show your support with a supporter-exclusive comment flair!