Louis Mandylor (born Elias Theodosopoulos; 13 September 1966) is an Australian film and television actor.

Mandylor is best known for playing Nikos "Nick" Portokalos in the My Big Fat Greek Wedding franchise (2002-2023).

(Ironically, during the original casting for the series, Mandyler had auditioned for the part of Joey, but Matt LeBlanc was selected instead of him.

Louis portrayed Deputy Lloyd in the Syfy thriller film The Cursed; he stars alongside his brother Costas.

[3] One of his more popular roles was that of Bobby DeLuca in the film Suckers (2001), where he plays a good-guy turned car salesman.