Jean-Luc Godard made Anna Karina his muse and his lover; Grace Kelly left cinema to be a princess. El material de los sueños: Historias del cine y del espectáculo explores these frictions between reality and fiction, often with diffuse and incommensurable repercussions in both spheres. Santiago Roncagliolo, writer and journalist, will talk to Clara Elvira Ospina about how art and spectacle are not only resources that we use to convince us that the world is more beautiful, more exciting and more intense than reality, but that they often invade life itself and mould it as they pass.