20 Mind-Blowing Facts About It's Always Sunny In Philadelphia

16. The McPoyles Are Based On A Real Family

Somewhat terrifyingly, the McPoyle family are based off of a family of the same name that creator Rob McElhenney knew growing up in Philadelphia. Somewhat less terrifyingly, the real-life McPoyle's are not psychotic and inbred like they are on the show. McElhenney just borrowed the name and the fact that there were a lot of McPoyle family members for inspiration. The rest was up to the creators to flesh out.