The Keck telescopes were the first of the generation of 8-10 m class telescopes to implement natural and laser guide star adaptive optics (AO) systems. Over 1300 refereed science papers have been published using data obtained with these systems. The speaker will provide a brief overview of Maunakea and the Keck telescopes, followed by a discussion of the current Keck AO science capabilities, new systems under development, and plans for the future.