DREAM/calsenilin/KChIP3 is a calcium binding protein of the neuronal calcium sensor superfamily. DREAM interacts with DRE (downstream regulatory element) sites in the DNA to regulate transcription and with many proteins to exert specialized functions in different subcellular compartments. Work from different laboratories has identified a growing list of interacting proteins that constitutes the DREAM interactome. The knowledge of these interactions has greatly contributed to the understanding of the various physiological functions of DREAM.