  We report the discovery of three Transiting Exoplanet Survey Satellite
Objects of Interest (TOI) with signatures of pulsation, observed in more than
one sector. Our main goal is to explore how large is the variety of classical
pulsators such as $\delta$ Sct, $\gamma$ Dor, RR Lyrae and Cepheid among TOI
pulsators. The analysis reveals two stars with signatures of $\delta$ Sct and
one of $\gamma$ Dor, out of a sample of 3901 TOIs with available light curves
(LCs). To date, there is a very scarce number of known pulsating stars hosting
planets. The present finding also emerges as an exciting laboratory for
studying different astrophysical phenomena, including the effects of
star-planet interaction on pulsation and timing detection of planetary
companions. We have also identified 16 TOI stars with periodicities and LCs
morphology compatible with different classical pulsating classes, but for most
of them, the dominant frequency signals originate from contaminating sources.
