  The last decade has seen a revolution in the field of asteroseismology - the
study of stellar pulsations. It has become a powerful method to precisely
characterise exoplanet host stars, and as a consequence also the exoplanets
themselves. This synergy between asteroseismology and exoplanet science has
flourished in large part due to space missions such as $\textit{Kepler}$, which
have provided high-quality data that can be used for both types of studies.
Perhaps the primary contribution from asteroseismology to the research on
transiting exoplanets is the determination of very precise stellar radii that
translate into precise planetary radii, but asteroseismology has also proven
useful in constraining eccentricities of exoplanets as well as the dynamical
architecture of planetary systems. In this contribution, we introduce some
basic principles of asteroseismology and review current synergies between the
two fields.
