10+ Random Facts About 'It's Always Sunny In Philadelphia' Fans Should Know

It's Always Sunny in Philadelphia is one of the most bizarre shows on TV today.

With 144 episodes over 13 seasons, it is the longest-running live-action sitcom in American television.

How many of these behind-the-scene secrets did you already know?

It was all a dream.


Rob McElhenney can be credited with literally dreaming up the concept of It's Always Sunny.

Apparently, he had a nightmare about a man with cancer and his insensitive friends.

And thus the show was born!

The original plot was recycled.


Episode 4 of season 1, "Charlie Has Cancer" follows the same storyline as the original pilot episode.

Everyone but Danny Devito is married to another member of the cast.


Charlie Day is married to Mary Ellis, who plays The Waitress.

Rob McElhenney and Kaitlin Olson, Mac and Dee respectively, are married.

Glenn Howerton married Jill Latiano who briefly appeared in The D.E.N.N.I.S. System.

Devito almost drowned.


For the underwater sequence of the season 11 finale, Devito had to be weighed down as he was too buoyant.

When it was time to resurface he needed assistance from [safety divers](https://www.itsalways.com/danny-devito-drowned/.

Fat Mac.


In season 7 McElhenney deliberately put on 50 pounds to subvert the trope of sitcom characters getting more attractive over the years.

To do this he had to eat a whopping 5,000 calories a day!

Jordan Reid.


You may not have heard of her but Reid helped develop the show and originally played Dee.

She was dating McElhenney at the time but when they broke up she was dropped from the show.

Dee's original character.


Dee was originally the voice of reason for The Gang.

But after Olson's performance as the Dee we all know and love today, the writers were pushed to continue writing her that way.

The McPoyle family are based on reality.


This inappropriately close family are based on Day and McElhenney's memories of two different families they knew in their youth.

The end credits have secret messages.


Ever wondered what's up with the credits?

It's Day, McElhenny and Howerton speaking backward!

Season 1's secret message is 'You're stupid for playing this forward.'

Mac and Dee will never get together.


Olson revealed that she and her husband's characters will never date as their characters are too revolted by each other.

Now that's romance.

Dennis's dark side.


Howerton didn't want his characters name to be associated with his, due to the road Dennis would go down.

His increasingly sociopathic behavior has been deliberately cultivated since the first episode.

The 'Game of Thrones' episode.


GoT showrunners David Benioff and D.B. Weiss wrote the episode "Flowers for Charlie", where he is the lab rat for an experimental drug and briefly becomes super smart.

The show was almost called 'Jerks'.


It was supposed to be about 3 actor friends in LA struggling to make it in the industry.

They later decided to move it to Philadelphia where the characters own a dive bar.

The Green Man.


The inspiration for Charlie's green bodysuit was a friend of Day's who used to wear a similar suit to Eagle games in real life!

Olson's injuries.


In season 4 when Dee runs into a car headfirst, it's all Olson.

She had a stunt double on set but took a blow for the sake of comedy.