A condensed-cyclic compound and an organic light-emitting device including the same are provided. The condensed-cyclic compound is represented by Formula 1:

##STR00001##

wherein, in Formulae 1, 2A, and 2B, ring A.sub.1 is selected from a benzene group, a naphthalene group, a pyridine group, a pyrimidine group, a pyrazine group, a quinoline group, an isoquinoline group, a quinoxaline group, a quinazoline group, and a cinnoline group; ring A.sub.2 is selected from a pyridine group, a pyrimidine group, a pyrazine group, a quinoline group, an isoquinoline group, a quinoxaline group, a quinazoline group, and a cinnoline group; and ring A.sub.3 is selected from groups represented by Formula 2A and groups represented by Formula 2B. Further details about the compounds are presented.

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the interlayer includes a heterocyclic compound of Formula 1:
A.sub.1B.sub.1].sub.n1Formula 1
wherein, in Formula 1, the variables are defined herein.