  == Chaplin and Keaton ==  Limelight is, strictly speaking, not the only time Buster Keaton and Chaplin appeared together on screen: they also appear together in Seeing Stars, a minor publicity film (although I don't have appropriate sources, apart from http://en.wikipedia.org/wiki/Buster_Keaton#1940s_and_feature_films and http://www.youtube.com/watch?v=Zif7ENvTCgY).