Mona Lisa syndrome is the most fascinating of all pregnancy related syndromes. It represents the characteristic idiopathic lower motor neuron facial nerve palsy mainly presenting in third trimester and associated with facial asymmetry caused by protracted and incomplete motor regeneration of the facial nerve. We encountered a pregnant female with idiopathic left facial nerve palsy of initial House-Brackmann Grade VI who on serial monitoring with facial electroneurography was identified as Mona Lisa syndrome.