If all you know about this exuberant, self-regarding 1963 film is based on its countless inferior imitations (from Paul Mazursky’s Alex in Wonderland and The Pickle to Woody Allen’s Stardust Memories to Bob Fosse’s All That Jazz), you owe it to yourself to see Federico Fellini’s exhilarating, stocktaking original, an expressionist, circuslike comedy about the complex mental and social life of a big-time filmmaker (Marcello Mastroianni) stuck for a subject and the busy world surrounding him. It’s Fellini’s last black-and-white picture and conceivably the most gorgeous and inventive thing he ever did—certainly more fun than anything he made after it. (The only Fellini movie that’s about as pleasurable is The White Sheik.) With Claudia Cardinale, Sandra Milo, and Anouk Aimee. In Italian with subtitles.