Philadelphia (1993) (Library of Congress)Two actors received double recognition when the Library of Congress announced its most recent additions to the National Film Registry, a collection of classic films intended to highlight film preservation efforts and the depth and breadth of American film. Created in 1988, the National Film Registry adds 25 films every year. Half a dozen silent films were added to the registry, more than usual. Other newly added silent films include the first student film on record, made in 1916 at Washington University in St Louis, Mo. Widely familiar additions include one Boomer classic – The Big Chill (1983) – and several Gen X ones: Before Sunrise (1995), Clueless (1995) and The Karate Kid (1984.)