Louis Mandylor was born in Melbourne, Victoria, Australia. He is the son of Greek immigrants Louise (née Mandylaris) and Yannis Theodosopoulos, a taxi driver. He and his brother decided to take a shorter version of their mother's last name. Louis Mandylor is a film and television actor best known for his role in My Big Fat Greek Wedding and My Big Fat Greek Wedding 2. Before acting, he played professional soccer in Australia for four years. He played for Heidelberg United FC and also competed in five National League games in 1989 and scored one goal.