The 1960s opened with La Dolce Vita by Federico Fellini and its unforgettable lead: Marcello Mastroianni. The actor seemed to glide effortlessly through his roles — and through life — as if to say that life is not all that serious, or perhaps that it is far too serious not to be laughed at. But what kind of man was hiding behind the actor with the handsome, boyish looks, who appeared so gentle and nonchalant?

• Documentary