Gram of Thrones: a single-serving Tumblr that reminds you that winter is coming, and everyone knows that's the best time to take faux-vintage filtered photos.
According to a Facebook post from FB chief Mark Zuckerberg, Instagram will be developed separately from the social network, but it will be able to share photos automatically to Facebook and keep the ability to share to other social sites.
Posting Instagram photos to Facebook will be opt-out.
"This is an important milestone for Facebook because it's the first time we've ever acquired a product and company with so many users. We don't plan on doing many more of these, if any at all," said Zuckerberg in a statement.
Instagram, one of the most popular photo-sharing apps for iPhone, has finally made the leap to Android.
The Android app has all of the features of its iPhone cousin -- including a variety of built-in filters and photo effects -- and Instagram CEO Kevin Systrom says that "in some ways, it's better than our iOS app. It's crazy."
Instagram is available for free on Google Play, and works on phones running Android 2.2 and up.