Composite Higgs models provide a viable solution to the hierarchy problem. The models predict a new strongly coupled sector at the TeV scale which comes with virtues (discoverable new resonances at the LHC) and new questions (``What is the underlying strongly coupled model?''). In the first part of the talk, I present results on the prospects to detect heavy vector-like resonances (``top partners'') at LHC run 2. In the second part I discuss a potential UV embedding leading to a viable composite Higgs model, its new resonances and their phenomenological implications.