It was announced today that Steve Whitmire, who performed Kermit the Frog since Jim Henson passed away, has left the Muppets. Reasons why are unknown at this time. Steve did a fantastic job with his own characters like Rizzo and Wembley, as well as brilliantly carry on iconic ones like Jim Henson's Kermit and Richard Hunt's Beaker. The best to him on his future endeavors. You will be missed, Steve.