JOSH HERDMAN as Gregory Goyle - Harry Potter Genuine Autograph UACC Registered Dealers RD#308. Buy from the professionals. You are buying an original hand signed item - not a copy. A uniquely numbered Certificate Of Authenticity comes with each autograph. All of our photos are 8" x 10" unless otherwise noted. NO reprints, ONLY original autographs. A great addition to any autograph collection.