The design and synthesis of a series of new fluorescent coumarin-containing melatonin analogues is presented. The combination of high-binding affinities for human melatonergic receptors (h-MT₁R and h-MT₂R) and fluorescent properties, derived from the inclusion of melatonin pharmacophoric elements in the coumarin scaffold, yielded suitable candidates for the development of MT₁R and MT₂R fluorescent probes for imaging in biological media.