This study was designed to explore the influence of changes in children's knowledge on earlier constructed memories. Kindergartners' (N = 102) recall of a series of stories was examined as a function of their interpersonal knowledge about the main story character. Children's knowledge about the protagonist was manipulated prior to presentation of the stories, and the effects of their impressions on story recall were examined. A change in some of the children's impressions was then promoted, and the impact of this second knowledge manipulation on recall of previously heard stories was assessed. The results indicated that children's story recall was affected by their prior impressions. Moreover, following the second knowledge manipulation, children revised their story reports in ways that were consistent with their newly acquired impressions, which suggests that they had reconstructed their memories of previously heard stories. These findings provide evidence for both prospective and retrospective effects of knowledge on memory.