Kleine–Levin syndrome (KLS) alias sleeping beauty syndrome, is a rare sleep disorder. Clinically presenting as episodes of hypersomnolence, behavioral and cognitive disturbances, hyperphagia and hypersexuality. KLS may have an idiopathic onset or may be precipitated by neurological event or infection. Until date, no definite underlying cause is established and neither there are any definitive management guidelines. It remains a diagnosis of exclusion after other psychiatric and neurological causes have been ruled out. Coloring of presentation with behavioral and mood elements makes it important for a psychiatrist to be well-informed about the condition to avoid the erroneous diagnosis. KLS is a devastating illness, which robs the patient of time, experiences, and relationships. An early diagnosis and effective management can help patient escape from the morbidity caused by this disorder. Armodafinil and oxcarbamazepine have found to be effective in two of the case. The emphasis of this report is to add to the existing clinical knowledge of neurologists, psychiatrists and physicians. In the future, research is needed on genetic etiology and management of this disorder.

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