Angry Birds Space does 20 million downloads in first week
According to CMO Peter Vesterbacka, the game has now done more than 20 million downloads - on iOS, Android and PC/Mac - in its first week.
"A great start" he tweeted.
Of course, it's got plenty of catching up in terms of reaching the more than 150 million downloads each of the first three games have done.
No doubt the release of a free-to-play version will aid that; plus the Windows Phone 7 version, of course.