Cicero not only wrote dialogues (among other genres), but was one of the ancient authors most explicitly and consciously interested in the literary issues thrown up by use of the dialogue form. Moreover, his use of, and understanding of, the form developed throughout his literary career. This chapter focusses on the introductions to his dialogues, where Cicero speaks about the literary task of creating and re-creating his authorial voice (or voices). In the earlier works, Cicero presents his dialogues as if they were historical events, keeping his ostensible authorial voice wholly exterior to the ‘conversation’; but the later ones become more theatrical, with Cicero himself participating actively within them, inviting his readers to imagine what it must be like to eavesdrop on a discourse that is both ostensibly private and actively public.