Brett is Mac's gay cousin. He tells Mac that Paddy's Pub has become the biggest gay bar in Philly. ("The Gang Gets Racist") Appearances[edit | edit source] Season 1: "The Gang Gets Racist" Trivia[edit | edit source] In Season 9, we are introduced to a second cousin of Mac's, who is also homosexual . Actor[edit | edit source] Brett is portrayed by Ian Mackinnon. Retrieved from "https://itsalwayssunny.fandom.com/wiki/Brett?oldid=29825" Categories: Season 1 characters Family Minor characters It's Always Sunny in Philadelphia Characters Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.