Over the past decade, space-based asteroseismology has played an important role in the characterization of exoplanet-host stars and their planetary systems. In this talk, I will review current key synergies between asteroseismology and exoplanetary science such as the precise determination of radii and ages of host stars, the measurement of spin-orbit alignment and its impact on hot-Jupiter formation theories, as well as orbital eccentricity determination via asterodensity profiling. I will conclude with an outlook on future synergies (e.g., the precise characterization of super-Earths/Neptunes orbiting solar-type stars and the prospect of conducting a populational study of giant planets around evolved stars) and further provide an overview of the asteroseismic yield of exoplanet-host stars expected for the Transiting Exoplanet Survey Satellite (TESS).