Provided is a heterocyclic compound represented by Formula 1 below and an organic light-emitting device including the same. In Formula 1, R1 to R8 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted C1 to C60 alkyl group, a substituted or unsubstituted C3 to C60 cycloalkyl group, a substituted or unsubstituted C2 to C60 heteroaryl group, a substituted or unsubstituted C6 to C60 aryl group, or a substituted or unsubstituted C6 to C60 condensed polycyclic group, with the proviso that R2 is not wherein X is O, S, or Se.