Google today announced that Andy Rubin is leaving his post as head of Android and that he’ll be replaced by Sundar Pichai, the senior vice president of Chrome and apps.

In a blog post, CEO Larry Page said Rubin is stepping down to “start a new chapter at Google.” Pichai will continue his work with Chrome as well as take on Rubin’s responsibilities with Android.

Page praised the progress of Android since Rubin introduced it to him in 2004, pointing to global partnerships with more than 60 manufacturers, more than 750 million devices activated globally and 25 billion apps downloaded from Google Play.

In a three-month study ending in November 2012, Comscore noted that Android controlled nearly 54 percent of the mobile OS market share in the U.S.