  Magnetic fields play an important role at all stages of stellar evolution. In
Sun-like stars, they are generated in the outer convective layers. Studying the
large-scale magnetic fields of these stars enlightens our understanding of the
field properties and gives us observational constraints for the field
generation models. In this review, I summarise the current observational
picture of the large-scale magnetic fields of Sun-like stars, in particular
solar-twins and planet-host stars. I discuss the observations of large-scale
magnetic cycles, and compare these cycles to the solar cycle.
