As you may have heard, Google is replacing Android Market with Google Play. Actually, Google Play is a combination of Android Market, Google Music and the Google eBookstore.

If you have an Android device, you may be wondering how to update it. To answer your question, it will update automatically.

“If your device can be updated, the Android Market app will automatically update to the Google Play Store app,” Google says in a help center article. “Once you have it, the Google Play Store app automatically updates itself when new versions become available. This is a silent update, which means you will not see a notification and will not be prompted to update.”

The update will be rolling out over the coming days. Videos, books and music apps (in countries where they are available) will be upgraded to Google Play Movies, Google Play Books and Google Play Music apps.

“The music, movies, books and apps you’ve purchased will continue to be available to you through Google Play,” Google’s Director of Digital Content, Jamie Rosenberg, assures users. “Simply log in with your Google account like always.

On your device, the Android Market app icon will change to the Google Play Store icon. I’ve already heard some early criticism of the logo, but I imagine everyone will get used to.

For the movies, books and music apps, Google says you’ll begin to see Play versions of these, such as “Play Music,” and “Play Movies.”