Isaacs has proved that a finite group G is solvable whenever there are
at most three characters of pairwise distinct degrees in Irr(G) (Isaa
cs' three character degrees theorem). In this note, using Isaacs' resu
lt and the classification of the finite simple groups, we prove the so
lvability of G whenever Irr(G) contains at most three monolithic chara
cters of pairwise distinct degrees. 2 contains some additional results
about monolithic characters.