João Mário Lourenço Bagão Grilo (born 1958-11-08) is a Portuguese film director, author and professor, born in Figueira da Foz. He attended economics at the University of Coimbra but dropped out. In 1983, he graduated in sociology at Lisbon's ISCTE and in 1994 earned a Ph.D. in communication sciences from the New University of Lisbon. He is a full Professor in the Department of Communication Studies at the New University of Lisbon, where, among other courses, he teaches Filmology.