The Walking Dead actress Addy Miller has marked 10 years since the first episode of the show was filmed.The actress played the role of ‘Summer’, the child walker who Rick Grimes is forced to shoot in the opening moments of the premiere episode Days Gone Bye.Miller has now posted a series of behind-the-scenes pictures to mark the occasion, including photos with co-star Andrew Lincoln and former showrunner Frank Darabont.“10 years ago today I filmed the little role that changed my life!” she