MasterChefJuniorisanAmericancookingcompetitiontelevisionseriesthatisairingonFox.ItpremieredonFriday\,September27\,2013.ItisbasedontheformatoftheU.K.seriesJuniorMasterChef.OnMarch5\,2014\,MasterChefJuniorwasrenewedforathirdseasonbeforeproductiononseasontwobegan.ThesecondseasonpremieredonNovember4\,2014.ThethirdseasonpremieredonJanuary6\,2015.ThefourthseasonpremieredonNovember6\,2015.ThefifthseasonpremieredonFebruary9\,2017.