In humans, some neurons can be detected migrating after birth from the subventricular zone (SVZ) to cortical regions; however, it is not known to what extent these cells mature and become integrated into human forebrain circuits. Here, brain imaging and time-lapse confocal microscopy were used to show that young migrating neurons expressing interneuronal markers travel from the SVZ to various forebrain regions, including the anterior cingulate cortex, where they become integrated into local circuits.