  Theory suggests that the orbits of some close-in giant planets should decay
due to tidal interactions with their host stars. To date, WASP-12b is the only
hot Jupiter reported to have a decaying orbit, at a rate of 29$\pm$2 msec
year$^{-1}$. We analyzed data from NASA's Transiting Exoplanet Survey Satellite
(TESS) to verify that WASP-12b's orbit is indeed changing. We find that the
TESS transit and occultation data are consistent with a decaying orbit with an
updated period of 1.091420090$\pm$0.000000041 days and a decay rate of
32.53$\pm$1.62 msec year$^{-1}$. We find an orbital decay timescale of $\tau$ =
P/$|\dot P|$ = 2.90$\pm$0.14 Myr. If the observed decay results from tidal
dissipation, the modified tidal quality factor is Q'$_{\star}$ = 1.39$\pm$0.15
$\times 10^{5}$, which falls at the lower end of values derived for binary star
systems and hot Jupiters. Our result highlights the power of space-based
photometry for investigating the orbital evolution of short-period exoplanets.
