Even if you’ve never seen one of Family Guy‘s 400+ episodes, there’s a good chance you already know that Peter Griffin did not care for The Godfather. In fact, he’d go so far as to say that Francis Ford Coppola’s 1972 classic “insists upon itself.

Family Guy creator Seth MacFarlane has revealed the origins of one of the show’s most famous gags, which has since become a viral meme. The long-running animated sitcom, which began in 1999 and will start its 23rd season in February, has a history of controversial jokes and rarely holds back when choosing to mock certain celebrities.

After a clip from a 2006 episode of Family Guy went viral, the show's creator and star Seth MacFarlane explained the origin of the famous joke in which Peter Griffin admits he didn't like The Godfather.

Family Guy creator Seth MacFarlane shared some of the backstory on where Peter's classic "It insists upon itself" line came from.

Peter Griffin’s “It insists upon itself” criticism for The Godfather has really taken off online, so the original creator behind Family Guy revealed the real origin story behind the iconic line. In the Season 4 episode,

Turns out, there’s some history with that line. According to show creator Seth MacFarlane, “It insists upon itself” is a line from one of his former film teachers from Rhode Island School of Design whom said the same thing when discussing The Sound of Music which also happens to be Seth’s favorite movie.