needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (February 2010) Joshua Herdman Born 9 September 1987 (1987-09-09) (age 23) Hampton, Middlesex, England, United Kingdom Joshua Mintone[citation needed] Herdman (born 9 September[citation needed] 1987) is an English actor known for his roles in the Harry Potter films as Gregory Goyle. He has starred in all seven movies released to date. He also appeared in one episode of The Crust and one episode of The Bill. He was also in the 2002 Film Thunderpants with fellow Harry Potter actor Rupert Grint, playing the role of the bully Damon, and he appeared in a supporting role in the BBC's interactive drama series UGetMe..