Title: The Dawn of FIMP Dark Matter Abstract: I will present an overview of scenarios where the observed Dark Matter (DM) abundance consists of Feebly Interacting Massive Particles (FIMPs), produced non-thermally by the so-called 'freeze-in' mechanism. In contrast to the usual freeze-out scenario, frozen-in FIMP DM interacts very weakly with particles in the visible Standard Model sector and never attained thermal equilibrium with them in the early Universe. This makes frozen-in DM very difficult but not impossible to test.