‘The Dark Knight,’ ‘Grease’ among films inducted into National Film Registry

British actor Christian Bale (L), US actress Maggie Gyllenhaal (C) and US actor Aaron Eckhart pose during a photo session after a press conference to promote their latest movie "The Dark Knight" at a Tokyo hotel on July 29, 2008. (Kazuhiro Nogi/AFP via Getty Images/TNS)

This year’s inductees into the Library of Congress’ National Film Registry, a collection of the most influential American movies, include a neo-noir superhero action spectacle, a ’50s-set ’70s musical and an animated send-up of a classic fairy tale trope.