DUBAI, UNITED ARAB EMIRATES - DECEMBER 09: Rob Reiner poses during a portrait session during the 14th annual Dubai International Film Festival held at the Madinat Jumeriah Complex on December 9, 2017 in Dubai, United Arab Emirates. (Photo b

Rob Reiner filmed his surprise final role as George Washington in Larry David's HBO show 'Life, Larry and the Pursuit of Unhappiness.'