Orson Welles called Ernst Lubitsch (1892-1947) "a giant" whose "talent and originality are stupefying." Jean Renoir said, "He invented the modern Hollywood." Celebrated for his distinct style and credited with inventing the classic genre of the Hollywood romantic comedy and helping to create the musical, Lubitsch won the admiration of his fellow directors, including Alfred Hitchcock and Billy Wilder, whose office featured a sign on the wall asking,...