  We construct a mass model of the cluster MACS J1149.6+2223 to study the
expected properties of multiple images of SN Refsdal, the first example of a
gravitationally lensed supernova with resolved multiple images recently
reported by Kelly et al. We find that the best-fit model predicts six supernova
images in total, i.e., two extra images in addition to the observed four
Einstein cross supernova images S1--S4. One extra image is predicted to have
appeared about 17 years ago, whereas the other extra image is predicted to
appear in about one year from the appearance of S1--S4, which is a testable
prediction with near future observations. The predicted magnification factors
of individual supernova images range from $\sim 18$ for the brightest image to
$\sim 4$ for the faint extra images. Confronting these predictions with future
observations should provide an unprecedented opportunity to improve our
understanding of cluster mass distributions.
