Louis Mandylor (born Elias Theodosopoulos;; 13 September 1966) is an Australian film and television actor. Mandylor played Nick Portokalos in My Big Fat Greek Wedding (2002), a role he reprised in the sequel My Big Fat Greek Wedding 2 (2016).
Mandylor was born in Melbourne, Victoria, Australia, the son Greek immigrants. He is the younger brother of fellow actor Costas Mandylor. He and his brother took a shorter version of their mother's last name, citing their paternal last name as being too long.
He played for Heidelberg United FC (Megas Alexandros) in their 1988 State League championship team. He also played five National League games in 1989 and scored one goal.
During his football career, he was also boxing in Melbourne, winning 14 fights with 4 losses. He then emigrated to the United States to originally pursue a boxing career and then subsequently an acting career.