12 Best It's Always Sunny In Philadelphia Guest Stars

It's Always Sunnier with these guest stars.

Charle, Roddy Piper, Mac, Dennis
FX

It’s cheap-looking, anarchic, transgressive and downright debauched. But with the show’s creators writing a 15th season, It’s Always Sunny in Philadelphia will become the longest running live-action sitcom in American television history. Not too shabby for a show that filmed its pilot on a camcorder.

However, the hit series actually owes a lot to its early introduction of Danny DeVito. Whilst the show was always funny, DeVito’s introduction enabled the it to ramp up the depravity, insanity and number of shaved men crawling on the floor covered in hand sanitizer. The series simply wouldn’t be what it is today without DeVito.

The boost provided by DeVito’s Frank Reynolds is a nice segue into looking at other famous faces that have appeared throughout the shows run - particularly those which have added that bit of something special.

Guest stars, whilst adding a bit of Hollywood magic to proceedings, are also fundamental to keeping seasons fresh and unpredictable. And the right guest star, as well as stealing the show, should also bring out the best in the series’ mainstays.

Here are a few cases of guest stars making Philadelphia just that bit sunnier.

12. Josh Groban

Charle, Roddy Piper, Mac, Dennis
FX

The initial thought of Josh Groban on It’s Always Sunny is akin to that of Tom Hanks in a UFC octagon. Groban seems far too kind for the lurid and depraved chaos of the show.

But for the series’s 100th episode, Groban (playing a fictional version of himself) makes an appearance as the love interest of Dee. Which admittedly needs some reverse engineering to explain.

In the episode ‘The Gang Saves The Day’, Groban appears alongside Dee, who has become a famous Hollywood actor. The pair are being interviewed for her upcoming film ‘Mother Earth’ in which Dee plays the eponymous role. In the interview Groban serenades Dee and claims that “Groban likes his ladies to pop”. However, the relationship lasts a mere 17 minutes before he is ditched in favour of Brad Pitt.

Naturally, this is all part of Dee’s fantasy. In the episode, the gang whilst on a beer run witness a robbery and fantasise a scenario in which they are the hero who saves the day. For Dee, after being given up by the gang she then turns on them and shoots them. Then after giving up the robber she is placed into witness protection as a butler which she spins into a star role on a sitcom.

Groban being part of Dee’s delusion is fitting, given that Josh Groban appearing on It’s Always Sunny sounds like a bad fever dream.

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