He's not the only one in Philly. Well, maybe now: [Saturday] "Blob director dies: Irvin Shortess "Shorty" Yeaworth Jr.,
who directed the 1958 cult movie "The Blob"...much of which was filmed in his Chester County backyard.
http://www.freerepublic.com/focus/f-news/1180604/posts
And let's not forget the great George Romero, who made all of his "Dead" films in and around Pittsburgh.